Study test in English (7)
I believe the answer is:
examine
'study' is the definition.
(synonyms)
'test in english' is the wordplay.
'test' becomes 'exam' (synonyms).
'english' becomes 'e' (abbreviation).
'exam'+'in'+'e'='EXAMINE'
(Other definitions for examine that I've seen before include "Subject to inspection" , "Test, probe" , "Question (a witness)" , "Formally question (law)" , "Inspect, study" .)