Learner in market showing natural ability (5)
I believe the answer is:
flair
'natural ability' is the definition.
(flair is a kind of natural ability)
'learner in market' is the wordplay.
'learner' becomes 'l'.
'in' means one lot of letters goes inside another.
'market' becomes 'fair' (I've seen this in other clues**).
'l' placed inside 'fair' is 'FLAIR'.
'showing' is the link.
(Other definitions for flair that I've seen before include "Stylish talent" , "Intuitive discernment" , "?lan, dash" , "Taste" , "Stylishness, originality" .)