Sure no coins can fool the expert (11)
I believe the answer is:
connoisseur
'the expert' is the definition.
(connoisseur is a kind of expert)
'sure no coins can' is the wordplay.
'can' is an anagram indicator (I've seen 'canned' mean this (canned can mean drunk)).
'sure'+'no'+'coins'='surenocoins'
'surenocoins' is an anagram of 'CONNOISSEUR'.
'fool' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for connoisseur that I've seen before include "Expert judge of taste" , "discriminating judge" , "Knowledgeable art-lover" .)