Trained officer to employ uniform stylist (8)
I believe the answer is:
coiffeur
'stylist' is the definition.
(coiffeur is a kind of stylist)
'trained officer to employ uniform' is the wordplay.
'trained' is an anagram indicator (to train can mean to grow something into a shape).
'to employ' means one lot of letters goes inside another.
'uniform' becomes 'u' (phonetic alphabet: alpha, bravo, charlie etc.).
'officer' with letters rearranged gives 'coiffer'.
'coiffer' enclosing 'u' is 'COIFFEUR'.
(Other definitions for coiffeur that I've seen before include "A French hairdresser" , "Skilled worker" , "Male hairdresser" , "One managing locks" , "Male snipper" .)