Quiet country with hot area for predatory fish (7)
I believe the answer is:
piranha
'predatory fish' is the definition.
'quiet country with hot area' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'country' becomes 'iran' (Iran is a country).
'with' means one lot of letters go next to another.
'hot' becomes 'h' (abbreviation, eg on taps).
'area' becomes 'a' (maths abbreviation).
'p'+'iran'+'h'+'a'='PIRANHA'
'for' is the link.
(Other definitions for piranha that I've seen before include "This predator" , "Ferocious fish" , "fish chewed up" , "Small voracious carnivorous fish" , "Fierce small fish of the Amazon" .)