Coin from Saracen treasure (4)
I believe the answer is:
cent
'coin' is the definition.
(cent is a kind of coin)
'from saracen treasure' is the wordplay.
'from' indicates a hidden word.
'CENT' is hidden within 'saracen treasure'.
(Other definitions for cent that I've seen before include "Part of a dollar" , "One-hundreth part of a currency" , "Small US coin" , "Little bit of money" , "cheap at this price?" .)