Trimming hair down there? (8)
I believe the answer is:
furbelow
'trimming' is the definition.
(thesaurus)
'hair down there?' is the wordplay.
'hair' becomes 'fur' (fur is a kind of hair).
'down there?' becomes 'below'.
'fur'+'below'='FURBELOW'
(Other definitions for furbelow that I've seen before include "Fringe" , "Ornamental trim" , "decoration for skirt, one gathered" , "Bit of skirt" , "Old-fashioned border of a skirt or petticoat" .)