Meeting chap caught in conflict with old wife (6)
I believe the answer is:
powwow
'meeting' is the definition.
(I've seen this before)
'chap caught in conflict with old wife' is the wordplay.
'chap caught in conflict' becomes 'pow' (abbreviation for prisoner of war).
'with' becomes 'w' (abbreviation).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'wife' becomes 'w'.
'pow'+'w'+'o'+'w'='POWWOW'
(Other definitions for powwow that I've seen before include "North American native ceremony" , "Talk - conference - meeting" , "A meeting for discussion, very English" , "Informal conference" , "(Native American) conference or meeting" .)