Woman supporting a learner being kept in (5)
I believe the answer is:
flora
'woman' is the definition.
'supporting a learner being kept in' is the wordplay.
'supporting' becomes 'for' (being for something means supporting it).
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'being kept in' is an insertion indicator.
'for'+'a'='fora'
'fora' enclosing 'l' is 'FLORA'.
(Other definitions for flora that I've seen before include "growing things" , "Plants < girl" , "Plant life (to go with fauna)" , "collection of plants" , "growing flowers" .)