Cool look -- male wearing a lead
I believe the answer is:
aplomb
'cool' is the definition.
('aplomb' can be a synonym of 'cool')
'look male wearing a lead' is the wordplay.
'look' becomes 'lo'.
'male' becomes 'm' (common abbreviation).
'wearing' is an insertion indicator.
'lead' becomes 'pb' (Pb is the chemical symbol for lead).
'lo'+'m'='lom'
'a'+'pb'='apb'
'lom' placed inside 'apb' is 'APLOMB'.
(Other definitions for aplomb that I've seen before include "Nonchalant confidence" , "Self-possession, assurance" , "Pompous dignity or poise" , "Air of self-satisfied confidence" , "Self-satisfied poise" .)