Female, Italian head, in good health (7)
I believe the answer is:
fitness
'good health' is the definition.
(fitness is a kind of good health)
'female italian head' is the wordplay.
'female' becomes 'f' (abbreviation).
'italian' becomes 'it'.
'head' becomes 'ness' (ness is a headland).
'f'+'it'+'ness'='FITNESS'
'in' is the link.
(Other definitions for fitness that I've seen before include "condition" , "Well-being" , "State of good health" , "Competence" , "Suitability - health" .)