No 11731, Monday 20 Jun 2016, Gridman

ACROSS
1   Supports watch on half a city for traitor (11) BACKSTABBER {BACKS}{TAB}ER?? Anno pending (Addendum - {BACKS}{TAB}{BERlin} - See comments)
9   A debtor, perhaps, decided not to run (7) ABORTED*
10 Unexpected assistance results in stray dog being found at collapsed dens (7) GODSEND {DOG*}{DENS*}
11 In conclusion, setter's to correct text (5) EMEND {E{ME}ND}
12 Company man at technical college gets support from board (9) COMMITTEE {CO}{M}{MIT}{TEE}
13 Hari's first to move sideways, to avoid commitment (5) HEDGE {Hari}{EDGE}
15 Feeling transported? I am transported – without a bit of sadness (9) SENTIMENT {SENT}{I'M}{sENT}
18 Bug women said to be where spies leave secret messages (9) EAVESDROP (~eves){EAVES}{DROP}
21 A man's author's representative (5) AGENT {A}{GENT}
22 A new recommendation on the matter of Italian food (9) ANTIPASTO {A}{N}{TIP}{AS TO}
24 I, mod I, employed peculiar language (5) IDIOM*
26 Dear, I will meet the journalist and get trained (7) DRILLED {DR}{I'LL}{ED}
27 Those times of weeks when I would be in shreds (7) FRIDAYS {FR{I'D}AYS}
28 Birds reportedly teased election candidates (11) ROADRUNNERS (~rode){ROAD}{RUNNERS}

DOWN
1   Boy cleans up tool – car part that presses (5,4) BRAKE SHOE {B}{RAKE S}{HOE} Definition is a bit iffy
2   Intimate ending (5) CLOSE [DD]
3   Assets end up in a state of glut (9) SATEDNESS*
4   Take this too: ones going round court are those hooked (7) ADDICTS {ADD{1{CT}'S}
5   A nob wildly running around exercise room may be an imaginary threat (7) BOGYMAN {A+NOB}* around {GYM}
6   Bones artist, girl and I collected together (5) RADII {RA}{DI}{I}
7   A tourist's desire is to ... ... (not remain here) (3,5) GET THERE [FITB]
8   One cuts confusion as daughter moves up (4) ADZE (-d)A(+d)DZE
14 Fit nicely bit of info about half-over (8) DOVETAIL {D{OVer}ETAIL}
16 I, grandmother in Delhi, not one to buckle in lassitude (9) INANITION {I}{NANI}{NOT+1}*
17 Times achanging, boys go round as ritual sign-bearers (9) TOTEMISTS {TIMES}* in {TOTS}
19 Live endlessly with limitless dual remainders (7) RESIDUA {RESIDe}{dUAl}
20 Tender college teacher brings up short citation (7) PROFFER {PROF}{FER<=}
22 Includes a carpenter's tool, say (4) ADDS (~adze)
23 Star is not seen. It's so cold (5) POLAR POLARis
25 Being angry, I tear around (5) IRATE {I}{TEAR*}

GRID