Hypnotised for a while before spring? (10)
I believe the answer is:
spellbound
'hypnotised' is the definition.
(spellbinding is a kind of hypnotizing)
'a while before spring?' is the wordplay.
'a while' becomes 'spell' (I've seen this before).
'before' says to put letters next to each other.
'spring?' becomes 'bound' ('bound' can be a synonym of 'spring').
'spell'+'bound'='SPELLBOUND'
'for' acts as a link.
(Other definitions for spellbound that I've seen before include "appear hypnotised" , "Enraptured" , "Captivated" , "Transfixed, mesmerised" , "Rooted to the spot" .)