Settle comfortably in the finest leather (6)
I believe the answer is:
nestle
'settle comfortably' is the definition.
(I've seen this before)
'in the finest leather' is the wordplay.
'in' indicates the answer is hidden within the clue.
'NESTLE' is hidden in the letters of 'finest leather'.
(Other definitions for nestle that I've seen before include "Lie snugly (in a place)" , "Cuddle closely" , "Snuggle into, say, embrace" , "Settle cosily" , "Snuggle up, settle in comfortably" .)