At last stubbly nurse got reconditioned shaver (9)
I believe the answer is:
youngster
'shaver' is the definition.
(synonyms)
'at last stubbly nurse got reconditioned' is the wordplay.
'at last' suggests the final letters.
'reconditioned' is an anagram indicator (I've seen this in other clues).
The last letter of 'stubbly' is 'y'.
'nurse'+'got'='nursegot'
'nursegot' with letters rearranged gives 'oungster'.
'y'+'oungster'='YOUNGSTER'
(Other definitions for youngster that I've seen before include "Kid" , "one of tender years" , "Adolescent" , "Juvenile" , "Youth" .)