Quarrel during light meal (6)
I believe the answer is:
tiffin
'light meal' is the definition.
(I've seen this before)
'quarrel during' is the wordplay.
'quarrel' becomes 'tiff' (tiff is a kind of quarrel**).
'during' becomes 'in' (I've seen this in other clues).
'tiff'+'in'='TIFFIN'
(Other definitions for tiffin that I've seen before include "Lunch (British Raj)" , "Anglo-Indian lunch" , "Light Indian repast" , "Indian midday meal" , "Light midday meal in India" .)