Get on with English recruit (6)
I believe the answer is:
engage
'recruit' is the definition.
(I've seen this before)
'get on with english' is the wordplay.
'get on' becomes 'age' (synonyms).
'with' means one lot of letters go next to another.
'english' becomes 'eng' (abbreviation).
'age' after 'eng' is 'ENGAGE'.
(Other definitions for engage that I've seen before include "Allay" , "Occupy (interest)" , "Mesh" , "Employ as a worker" , "Take into employment or occupy attention" .)