Talent shown by a number in entertainment (5)
I believe the answer is:
flair
'talent' is the definition.
(flair is a kind of talent)
'a number in entertainment' is the wordplay.
'a number' becomes 'l' (L is an example**).
'in' indicates putting letters inside.
'entertainment' becomes 'fair' (fair is a kind of entertainment).
'l' inserted into 'fair' is 'FLAIR'.
'shown by' is the link.
(Other definitions for flair that I've seen before include "Creative brilliance" , "Natural ability to do something well (5)" , "Natural ability/talent" , "skill" , "Taste" .)