Respected figure you once introduced to poet (7)
I believe the answer is:
doyenne
'respected figure' is the definition.
The definition suggests a singular noun which matches the answer.
'you once introduced to poet' is the wordplay.
'you once' becomes 'ye' (archaic version of 'you').
'introduced to' indicates putting letters inside.
'poet' becomes 'Donne' (16th- and 17th- century poet John Donne).
'ye' going into 'donne' is 'DOYENNE'.
Can you help me to learn more?
(Other definitions for doyenne that I've seen before include "Respected senior woman" , "Female most respected in a particular field" , "Senior female member of profession" , "Senior person" , "Leading female (in field)" .)