Verbal expression in woman's series of lectures? (9)
I believe the answer is:
discourse
'verbal expression' is the definition.
(discourse can mean spoken communication)
'woman's series of lectures?' is the wordplay.
'woman's' becomes 'dis' (Di is short for Diana).
'series of lectures?' becomes 'course' (I've seen this before).
'dis'+'course'='DISCOURSE'
'in' acts as a link.
(Other definitions for discourse that I've seen before include "Communication verbally" , "verbal communication" , "(Formal) talk" , "Speech - conversation" , "To hold a conversation" .)