Criticise achievement of card player (4)
I believe the answer is:
slam
'criticise achievement of card player' is the definition.
'slam' can be an answer for 'criticise' (thesaurus). I am not certain of the 'achievement of card player' bit.
'criticise achievement' is the wordplay.
'criticise' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'achievement' becomes 'lam' (lam is a kind of achievement).
's'+'lam'='SLAM'
Can you help me to learn more?
(Other definitions for slam that I've seen before include "Shut loudly and forcibly" , "Criticise - attack" , "Shut hard" , "Criticise - bang - very good result at bridge" , "Winning of 12 or 13 tricks at bridge" .)