An officer is beginning to train one without special skills (10)
I believe the answer is:
generalist
'train one without special skills' is the definition.
I can't judge whether this defines the answer.
'an officer is beginning to' is the wordplay.
'an officer' becomes 'general' (general officer is a kind of officer).
'beginning' says to take the initial letters.
The initial letter of 'to' is 't'.
'general'+'is'+'t'='GENERALIST'
Can you help me to learn more?
(Other definitions for generalist that I've seen before include "Non-specialist" , "All-rounder" , "Person with broad interests" , "Versatile ten [SCHOOLTEACHER]" .)