Sit awkwardly with a man, revealing bottom (7)
I believe the answer is:
stamina
'bottom' is the definition.
(I've seen this before)
'sit awkwardly with a man' is the wordplay.
'awkwardly with' indicates anagramming the letters.
'a'+'man'='aman'
'sit' mixed up with 'aman' gives 'STAMINA'.
'revealing' is the link.
(Other definitions for stamina that I've seen before include "capability to keep going" , "Indefatigability" , "Endurance, strength to stay the course" , "Resilience" , "toughness in > male parts" .)