Learner kept in consumed share, for a change (10)
I believe the answer is:
alteration
'a change' is the definition.
(alteration is a kind of change)
'learner kept in consumed share' is the wordplay.
'learner' becomes 'l'.
'kept in' indicates putting letters inside.
'consumed' becomes 'ate' (eating is a kind of consuming).
'share' becomes 'ration' (ration is a kind of share).
'l' placed within 'ate' is 'alte'.
'alte'+'ration'='ALTERATION'
'for' acts as a link.
(Other definitions for alteration that I've seen before include "Adjustment" , "Amendment" , "Change" .)