Settle comfortably in finest leather (6)
I believe the answer is:
nestle
'settle comfortably' is the definition.
(I've seen this before)
'in finest leather' is the wordplay.
'in' indicates the answer is hidden within the clue.
'NESTLE' can be found hidden inside 'finest leather'.
(Other definitions for nestle that I've seen before include "Lie in cosily" , "Lie snugly (in a place)" , "Curl up comfortably in soft place" , "Huddle (together)" , "lie comfortably" .)