March, maybe, after conflict — displaying passion (6)
I believe the answer is:
warmth
'passion' is the definition.
(I know that passion can be written as warmth)
'march maybe after conflict' is the wordplay.
'march maybe' becomes 'mth' (mth is an abbreviation for month).
'after' is a charade indicator (letters next to each other).
'conflict' becomes 'war' (war is a kind of conflict).
'mth' after 'war' is 'WARMTH'.
'displaying' is the link.
(Other definitions for warmth that I've seen before include "Comfort" , "Result if heated" , "Intensity of emotion" , "Sensation caused by heat" , "Ardour" .)