One coming out of underground uprising captured by poet (9)
I believe the answer is:
debutante
'one coming out' is the definition.
(I've seen this before)
'underground uprising captured by poet' is the wordplay.
'underground' becomes 'tube' ('tube' can be a synonym of 'underground').
'uprising' shows that the letters should be reversed in order.
'captured by' is an insertion indicator.
'poet' becomes 'dante' (I've seen this before).
'tube' backwards is 'ebut'.
'ebut' inserted inside 'dante' is 'DEBUTANTE'.
'of' is the link.
(Other definitions for debutante that I've seen before include "eligible young lady?" , "socialite" , "Maiden speaker" , "one about to come out" , "One entering society for the first time" .)