Crowd good at English (4)
I believe the answer is:
gate
'crowd' is the definition.
(thesaurus)
'good at english' is the wordplay.
'good' becomes 'g' (abbreviation).
'english' becomes 'e' (abbreviation).
'g'+'at'+'e'='GATE'
(Other definitions for gate that I've seen before include "Plane-boarding point" , "Barrier - door" , "Barrier, exit" , "Spectators - entrance" , "Total of spectators" .)