Solution to 17A has been deliberately left unsolved and is to be answered only by a non-regular / novice commenter, with proper annotation. Those who have answered earlier in the week, please give others a chance.
Open for anyone to answer, if not solved by 1 PM.
ACROSS
1 Pushes husband wearing wife's slippers! (6) WHEELS {H} in {W}{EELS}
4 Fuss over evil good-looking guy (6) ADONIS {ADO}{SIN<=}
9 Spice girl pursuing Beckham, initially (4) HERB {HER}{Be...m}
10 Bishop wants retired man to shelter bar worker (10) BLACKSMITH {B}{LACKS}{H{T}IM<=}
11 Farmer welcoming start of heavy rain (6) SHOWER {S{He..y}OWER}
12 Gain weight (8) INTEREST [DD]
13 Tight grip controlling low expenditure's ultimately right (9) PRIVILEGE {PRI{VILE}G*}{e...rE}
15 Feeling pain accumulate in each year (4) ACHY [T]
16 Greek national secure around armoured vehicle (4) TANK [T<=]
17 Reverend's daytime slash after-hours entertainment (9) ?I?H?L?F?
21 Former engineer cries at inauguration of express train (8) EXERCISE {EX}{CRIES*}{Ex...s}
22 First signs of nature in Marina beach lift you lightly (6) NIMBLY Acrostic
24 Famous Doctor Seuss having carbon copy nearly intact (10) SUCCESSFUL {SU{CC}ESS*}{FULl}
25 Ignore order to get vermouth (4) OMIT {OM}{IT}
26 Odd number's not odd beyond base fifty (6) ELEVEN {EVEN}<=>{E}{L}
27 Including confusing line deleted (6) ADDING ADDlING
DOWN
1 Discussion of climate condition (7) WHETHER (~weather)
2 Crook's below criminal (5) ELBOW*
3 Handsome bachelor's driving away in genuine Tesla (7) LIBERAL LI(-t+b)BERAL
5 Fanning brings up reasonably boring information (6) DAKOTA {DA{OK<=}TA}
7 Please model when up against cover of fortnightly (7) SATISFY {SIT}{AS}<={Fo...lY}
8 Mike Gatting mostly bats elsewhere when not working (6,4,3) TAKING TIME OFF {MIKE+GATTINg}* [RA] (Correction - {MIKE+GATTINg}*{OFF} - See comments)
14 Recline with TV broadcast in chamber (9) VENTRICLE {RECLINE+TV}*
16 Quality of book concerning University's higher up (7) TEXTURE {TEXT} with {RE}<=>{U}
18 Managed hard then went ahead (7) HANDLED {H}{AND}{LED}
19 Shooting after holding steady with the other hand (7) FILMING FI(-r+l)LMING
20 Paper suits worn at entrance of ER (6) TISSUE {SUITS*}{Er}
Reference List
Husband = H, Wife = W, Bishop = B, Bar = T, Order = OM(Order of Merit), Vermouth = IT, Base = E, Fifty = L, Line = L, Bachelor = B, Tesla = T, India = I, Minute = M, Concerning = RE, University = U, Hard = H, Low = MOO, Indian = I


