Conform, having seizure at home (3,2)
I believe the answer is:
fit in
'conform' is the definition.
(I've seen this in another clue)
'seizure at home' is the wordplay.
'seizure' becomes 'fit' (fit is a kind of seizure).
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'fit'+'in'='FIT IN'
'having' acts as a link.
(Other definitions for fit in that I've seen before include "Find time for" , "Make room or time for" , "Not be out of place" , "Belong" , "Make room for; be acceptable" .)