Complete an unspecified number, healthy (9)
I believe the answer is:
wholesome
'healthy' is the definition.
(similar in meaning)
'complete an unspecified number' is the wordplay.
'complete' becomes 'whole' (associated in meaning).
'an unspecified number' becomes 'some' (I've seen this before).
'whole'+'some'='WHOLESOME'
(Other definitions for wholesome that I've seen before include "Previously propitious" , "Good for you!" , "Moral" , "Respectable" , "Beneficial" .)