Guy Henry is central to absurd thing for women only (3,5)
I believe the answer is:
hen night
'guy henry is central' is the definition.
I know nothing about this answer so I can't judge whether this works.
'absurd thing for women only' is the wordplay.
'absurd' indicates an anagram.
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'women only' becomes 'hen' (as in 'hen do').
'thing' with letters rearranged gives 'night'.
'night' after 'hen' is 'HEN NIGHT'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for hen night that I've seen before include "Party for women only" , "party of girls" , "Bridal celebration" , "Bride-to-be's party" , "Amusing the girls, bash" .)