Second fever not contracted within stage family (8)
I believe the answer is:
montague
'family' is the definition.
(I have seen 'Veronese family' mean 'montague' so perhaps 'family' could also mean 'montague')
'second fever not contracted within stage' is the wordplay.
I cannot quite see how this works, but
'second' could be 'mo' (both are short periods of time) and 'mo' is found in the answer.
'fever' could be 'ague' (I've seen this before) and 'ague' is present in the answer.
'not' could be 'nt' (synonyms) and 'nt' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for montague that I've seen before include "Romeo was one" , "family involved in tragedy" , "Italian noble" , "Romeo, say" , "Romeo's family name" .)