Scrap of earth above hole? (3-2)
I believe the answer is:
set-to
'scrap' is the definition.
(I know that set-to is a type of scrap)
'earth above hole?' is the wordplay.
'earth' becomes 'sett' (both can refer to an animal's underground home).
'above' means one lot of letters go next to another (in a down clue, some letters go above others).
'hole?' becomes 'O' (O looks like a hole).
'sett'+'o'='SET-TO'
'of' is the link.
(Other definitions for set-to that I've seen before include "Disagreement, fight" , "Fight, argument" , "brush with violence?" , "Scrap" , "Brief fight" .)