Be born healthy, get an advantage (7)
I believe the answer is:
benefit
'an advantage' is the definition.
(thesaurus)
'be born healthy' is the wordplay.
'born' becomes 'ne'.
'healthy' becomes 'fit' ('fit' can be a synonym of 'healthy').
'be'+'ne'+'fit'='BENEFIT'
'get' is the link.
(Other definitions for benefit that I've seen before include "Something that aids" , "Charity event" , "Advantage or blessing" , "Fine bet (anag)" , "Fine bet on to produce an advantage" .)