Islander is wanted in training (4,6)
I believe the answer is:
west indian
'islander' is the definition.
(I've seen this before)
'is wanted in training' is the wordplay.
'training' is an anagram indicator (to train can mean to grow something into a shape).
'is'+'wanted'+'in'='iswantedin'
'iswantedin' is an anagram of 'WEST INDIAN'.
(Other definitions for west indian that I've seen before include "islander" , "Caribbean" .)