Cantankerous old person who's against burying muck in drive (10)
I believe the answer is:
curmudgeon
'cantankerous old person' is the definition.
'curmudgeon' can be an answer for 'person' (curmudgeon is a kind of person). I am not certain of the 'cantankerous old' bit.
'against burying muck in drive' is the wordplay.
I cannot quite see how this works, but
'against' could be 'on' (I've seen this in other clues) and 'on' is located in the answer.
'muck' could be 'mud' (synonyms) and 'mud' is located in the answer.
'drive' could be 'urge' (I've seen this in another clue) and 'urge' is present in the remaining letters.
A single letter 'c' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'who's' is the link.
Can you help me to learn more?
(Other definitions for curmudgeon that I've seen before include "Dunce or mug (anag) - grumbler" , "Bear" , "Bad-tempered person" , "Malcontent, grouch" , "Meldrew, say" .)