Put in bar with English? Terminal (9)
I believe the answer is:
electrode
'terminal' is the definition.
'put in bar with english?' is the wordplay.
'put in' becomes 'elect' (I've seen this before).
'bar with' becomes 'rod' (I've seen this in other clues. I am not sure about the 'with' bit.**).
'english?' becomes 'e' (abbreviation).
'elect'+'rod'+'e'='ELECTRODE'
(Other definitions for electrode that I've seen before include "Conductor by which current enters" , "Conductor making contact in a circuit" , "Conductor (eg, in battery)" , "Terminal of, eg, an acid battery" , "Conducting point by which electric current enters or leaves" .)