Fine service by jester for king? (4,4)
I believe the answer is:
face card
'king?' is the definition.
(king is a kind of face card)
'fine service by jester' is the wordplay.
'fine' becomes 'f' (abbreviation e.g. condition of old coins, books).
'service' becomes 'ace' (ace is a kind of service).
'by' means one lot of letters go next to another.
'jester' becomes 'card' (I've seen this in another clue).
'f'+'ace'+'card'='FACE-CARD'
'for' is the link.
(Other definitions for face card that I've seen before include "not a joker" , "Maybe knave" , "One of 12 in a deck" , "Jack for instance" , "Queen or Jack, say?" .)