Identifying leading man dismissing deal (6)
I believe the answer is:
naming
'identifying' is the definition.
('name' can be a synonym of 'identify')
'leading man dismissing deal' is the wordplay.
'leading' is a charade indicator (letters next to each other).
'dismissing' indicates anagramming the letters (I've seen 'dismissed' mean this).
'deal' becomes 'ing' (I can't explain this - if you can you should believe this answer much more).
'man' anagrammed gives 'nam'.
'nam' next to 'ing' is 'NAMING'.
Can you help me to learn more?
(Other definitions for naming that I've seen before include "Allotting term to" , "Conferring appellation on" , "Titling" , "Identifying, citing" , "Christening" .)