No 11443, Friday 10 Jul 2015, Vulcan

ACROSS
1   With ease, swimming in salty waters (5,3) WHITE SEA*

5   Humane offer (6) TENDER [DD]
9   Additional information on the side, it's about our stock exchange (5) INSET {I{NSE}T}
10 Probe carried out by a writer associated with a daily gathering pace (9) PENETRATE {PEN}{ET}{RATE}
12 Conscious feeling animals essentially lacking (8) SENTIENT SENTImENT
13 A legend's first bad recording (5) ALBUM {A}{Le...d}{BUM}
15 Invites letters from apprentice/ students (7) ENTICES [T]
16 Fault setter tried ungracefully to defend (7) DEMERIT {DE{ME}RIT*}
18 Aid work interrupted by rains, ruined basically a delivery for the affected (7) AIRDROP {AI{Rains}D}{Ru...d}{OP}
21 Good fashion sense captivating current generation (7) GENESIS {G}{ENES{I}S*}
23 Dug a pit for Bear, say (5) HOLED (~hold)
25 Calm autumn twilight (8) EVENFALL {EVEN}{FALL}
27 Saltiness perhaps is antiseptic (9) STAINLESS*
28 Refuse to fight (5) SCRAP [DD]
29 Stitch operated uterus (6) SUTURE*
30 Unique speech given by Charlie about large European Community (8) IDIOLECT {IDIO{L}EC}T} New word for me

DOWN
1   Rest of the answer is in wordplay (4) WAIT {W{A}IT}
2   Animal with innate power to observe (7) INSPECT {INS{P}ECT}
3   Vehicle in a contest overturned, say, splitting it into two (6,3) ESTATE CAR {E{STATE} CAR<=}
4   Clear state (7) EXPRESS [DD]
6   Very old art forms (5) EXTRA {EX}{ART*}
7   Rabbi mostly wearing a colour that's showing up duller (7) DRABBER {D{RABBi}ER<=}
8   That which causes pain matures him anyhow (10) RHEUMATISM*
11 Famous study taken up about a collection of books (5) NOTED {N{OT}ED<=}
14 It's the same after transportation of letters (10) METATHESIS* &lit
17 Shot into fame with second public statement (9) MANIFESTO {INTO+FAME+S}*
19 Confident priest caught in rhetoric (7) RELIANT {R{ELI}ANT}
20 Work in harmony as told (5) PIECE (~peace)
21 Coated key piece of metal with arsenic on the inside (7) GREASED {G}{RE{AS}ED}
22 Special need to spend (7) SPLURGE {SPL}{URGE}
24 Restaurant's sardine not as fresh (5) DINER saRDINE*
26 Catch sight of second vessel (4) SPOT {S}{POT}

GRID