Head (of a coin) (7)
I believe the answer is:
obverse
'head of a coin' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for obverse that I've seen before include "Side of coin that bears principal design or head" , "Side of a coin that shows heads" , "Side of the coin containing the principal figure" , "Opposite - side of coin" , "Side normally seen" .)