Face King John first (4)
I believe the answer is:
look
'face' is the definition.
(I know that face can be written as look)
'king john first' is the wordplay.
'king' becomes 'k' (abbreviation for king in chess).
'john' becomes 'loo' (both can mean a toilet).
'first' says to put letters next to each other.
'k' after 'loo' is 'LOOK'.
(Other definitions for look that I've seen before include "Mien" , "Watch, observe" , "See; appearance" , "Facial expression" , "Appear - search" .)