Freedom from parasites requiring careful attention getting rid of one (7)
I believe the answer is:
licence
'freedom' is the definition.
(licence is a kind of freedom)
'parasites requiring careful attention getting rid of one' is the wordplay.
'parasites' becomes 'lice' (I've seen this before).
'requiring careful attention' becomes 'nice' (nice could historically mean intricate or delicate).
'getting rid of' is a deletion indicator.
'one' becomes 'I' (roman numeral).
'nice' with 'i' taken away is 'nce'.
'lice'+'nce'='LICENCE'
'from' is the link.
(Other definitions for licence that I've seen before include "What a driver needs" , "Authority - or freedom!" , "Legal document giving official permission" , "Leave" , "-- plate; poetic --" .)