1 - Dire prospects improved by loyalty to the group (6,2,5) - ESPRIT DE CORPS* The army runs on this
10 - Sausage that gives vigour through ion change (9) - {PEP}{PER}ONI*
11 - Work unit captured by an Anjou lensman (5) - JOULE [T]
12 - The endless spirit needed to pluck idly at the guitar strings (5) - {TH(-e)}{RUM}
13 - A companion, though a fool to an extent (9) - ASSOCIATE Anno pending
14 - Stupid chap returns money with funny remark (6) - {NIT<-}{WIT}
16 - The way to cook British fat (5) - {BR}{OIL}
19 - Place for a grown cygnet (5) - {A}{SWAN}
20 - Topless cloak, right at the end for a deer’s feature (6) - (-m)ANTLE{R}
25 - Outward appearance of a doctor, 50, in a ‘spirited’ meeting (9) - SE{MB}{L}ANCE
26 - Tie up returned pieces (5) - STRAP <- )
27 - Trendy, small flat but not suitable (5) - {IN}{APT}
28 - Assume children disagree (with others) (4,5) - {TAKE} {ISSUE}
29 - Examination in a Tamil court disrupted (13) - MATRICULATION*
DOWN
2 - Distinctly different eastern trooper included in an odd set (8) - S{E}{PARA}TE*
3 - Discharge of a male in strange garb (5) - R{HE}UM
4 - Norse god with a cross on the chest (6) - {THOR}{A}{X}
5 - Man (or woman) with a message (8) - EMISSARY [E]
6 - Disapproval of a thing, one in action (9) - {OBJECT}{I}{ON} Nice clue
7 - One cannot be this (6) - PLURAL [CD]
8 - Behave amorously around dawn of Tuesday? Exactly what is needed (4-2) - SPO{T}-ON
9 - Even this kind of field ensures playing on equal terms (5) - LEVEL [DD]
15 - Poor conductor! (9) - INSULATOR [E]
17 - Captivating cinema, great production (8) - MA{G}NE{T}IC* How does T come about?
18 - A student, nearly new, with business in the open air (8) - {A}{L}{FRES(-h)}{CO}
21 - Charge that is right for a sword (6) - {RAP}{IE}{R}
22 - Jelly got from some sapotas picked in season (5) - ASPIC [T]
23 - Graceful creature of Africa (6) - IMPALA [E]
24 - Germany’s first woman Chancellor (6) - MERKEL [E]
26 - Change of costume (5) - SHIFT [DD]
GRID