Learner at university in bloomer (5)
I believe the answer is:
lupin
'bloomer' is the definition.
(I've seen this before)
'learner at university in' is the wordplay.
'learner' becomes 'l'.
'at university' becomes 'up'.
'l'+'up'+'in'='LUPIN'
(Other definitions for lupin that I've seen before include "Plant with erect spikes of usually purplish-blue flowers" , "Nobody's child" , "Spiky flower" , "Flower named from wolf" , "Flower called after wolf" .)