Cleverly train as a skilled worker (7)
I believe the answer is:
artisan
'a skilled worker' is the definition.
(an artisan is a skilled craftsperson)
'cleverly train as' is the wordplay.
'cleverly' indicates an anagram (a clever or tricky version of the letters).
'train'+'as'='trainas'
'trainas' with letters rearranged gives 'ARTISAN'.
(Other definitions for artisan that I've seen before include "Skilled workman" , "man with skill" , "Tsarina (anag.)" , "crafty person?" , "one in command of craft?" .)