Poet with name for posh opportunist (7)
I believe the answer is:
chancer
'opportunist' is the definition.
(someone taking chances)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for chancer that I've seen before include "Unscrupulous opportunist" , "Exploiter of opportunity" , "Unscrupulous sort" , "One taking risks" , "Informally, one who tries his luck" .)