English campaign – there's an issue (8)
I believe the answer is:
emission
'there's an issue' is the definition.
(I've seen this before)
'english campaign' is the wordplay.
'english' becomes 'E' (abbreviation as in OED).
'campaign' becomes 'mission' (campaign can mean a task or mission).
'e'+'mission'='EMISSION'
(Other definitions for emission that I've seen before include "A giving out or putting forth" , "Something given out" , "radiation leakage?" , "Is in some (anag) - discharge" , "Going out" .)