No 11598, Tuesday 12 Jan 2016, Neyartha

Neyartha in a blue mood.

ACROSS
1   Package holding features indiscernible to the human eye? (7,4) SILICON CHIP [CD]
9   Japanese art exhibited in Maori gaming houses (7) ORIGAMI [T]
10 Corruption returns with valuable rock in retreat for the bullfighter on foot (6) TORERO {TOR<=}{ERO<=}
11 Monotony of the nine broken by dropping uranium inside (5) ENNUI {U} in {NINE}*
12 Strongly built alien goes behind the reservoirs (4-3) WELL-SET {WELL-S}{ET}
15 Duck's colour (4) TEAL [DD]
16 Differentials Al solved before final removal by one supporting a stronger centre (10) FEDERALIST {DIFfEREnTialS+AL}*
18 Official nailed frame for citation (10) ACCREDITED {AC}{CREDITED} Not sure of anno (Addendum - {AC{CREDIT}ED} - See comments)
20 Boasted in speech about a colour (4) BLUE (~blew)
23 Mythical bird eating a parasitic larva on an island is emotionless (7) ROBOTIC {RO{BOT}{I}C}
24 Fluent government leader overwhelmed by promotion had to proceed without notes (2-3) AD-LIB {AD}-{gLIB}
26 Contract with a psychiatrist (6) SHRINK [DD]
27 Article and movable scale returned before clergyman gets lost in that place (7) THEREON {THE}REON Anno pending (Addendum - THEREIN {THE}{RIENrev<=} - See comments)
28 American realtor to declare maturity on entering the medical department (6,5) ESTATE AGENT {STATE} {AGE} in {ENT}

DOWN
2   Handwriting style of the single volunteer left in charge (6) ITALIC {1}{TA}{L}{IC}
3   Satirists smuggle a flowering plant (4) IRIS [T]

4   Open to rewriting the novel before the Spanish (2,3,5) ON THE LEVEL {THE+NOVEL}*{EL}
5   Colour of container holding bait sent up by Edward (8) CERULEAN {C{ERUL<=}{E}AN}

6   Someone from the Middle East with former British PM Benjamin lost his head (7) ISRAELI dISRAELI
7   Likely for the egg to be placed in the deformed tin plate (9) POTENTIAL {O} in {TIN+PLATE}*
8   Antivenin prepared without tin in the capital city (6) VIENNA AntiVENIN*
13 Colour of a marine snail on the woody herb (10) PERIWINKLE [MD]

14 Speaker's take censored for the audience by a Caribbean musical group (5,4) STEEL BAND (~steal){STEEL} {BAND}
17 Wheat milling byproduct for aliens cracked before imbibing revolutionary sacred chant (8) SEMOLINA {OM<=} in {ALIENS}*
19 They might be difficult to find in a nudist colony (7) CLOTHES [CD]
21 Picked up female replaced by the student and sang cheerfully (6) LILTED {LI(-f+l)LTED}
22 Type of fabric getting the senate dissolved (6) SATEEN*
25 Identifies leading scientist going to the top with an animal (4) STAG (+s)STAG(-s)

GRID