Solution to 26A has been deliberately left unsolved and is to be answered 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
8 Cost of travel in Cardiff area (4) FARE [T]
10 Extraordinary risk irritates (4) IRKS*
11 Literary king with book came to know (6) LEARNT {LEAR}{NT}
12 Rival's pop nonet composition (8) OPPONENT*
13 Deserter from Army Post Office, say (8) APOSTATE {APO}{STATE}
15 Horrible diatribe on losing inspection bungalow, in short, is a verbal attack (6) TIRADE {DiATRIbE}*
17 Traverses tomb markers (7) CROSSES [DD]
26 Perhaps, heel's weapon? (8) ?T?L?T?O (Addendum - STILETTO [DD] - See comments)
28 Where a group of swimmers may study? (6) SCHOOL [C&DD]
30 Ship from Karwar goes (4) ARGO [T]
31 Rub off Times emblem in the beginning (5) ERASE {ERAS}{Em...m}
32 Type of house built without using aluminium in Salem, India (4) SEMI {SalEM}{I}
DOWN
1 Uncommon in Almora region (4) RARE [T]
2 Thaws forests being chopped up after beginning of December (8) DEFROSTS {FORESTS}*<=>{De...r}
3 Rule: "No pets in apartments under renovation" (6) MANTRA {ApARTMeNts}*
4 One behind Line of Control rejected final call for military officer (7) COLONEL {ONE}<=>{LOC<=} and {calL}
7 Hide runner at end of garden (4) SKIN {SKI}{g...eN}
14 Hidden and concealed in sniper duty (5) PERDU [T] &lit
16 Pass away, having taken 9 in custody, in Southern US (5) DIXIE {D{IX}IE}
18 Extraordinary Lent diet is allowed (8) ENTITLED*
25 We returned with money for nut (6) CASHEW {WE<=}<=>{CASH}
27 Conservative's attempt to consume egg (4) TORY {T{O}RY}
29 Units of Resistance from Head Office rejected manuscript (4) OHMS {HO<=}{MS}
Reference List
The in Spanish = EL, Book = NT(New Testament), Line of Control = LOC, Manuscript = MS