Is one into fish here? (7)
I believe the answer is:
tunisia
'here?' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'is one into fish' is the wordplay.
'one' becomes 'I' (Roman numeral).
'into' means one lot of letters goes inside another.
'fish' becomes 'tuna' (tuna fish is a kind of fish).
'is'+'i'='isi'
'isi' inserted within 'tuna' is 'TUNISIA'.
Can you help me to learn more?
(Other definitions for tunisia that I've seen before include "Republic in northwestern Africa" , "North African republic" , "As Inuit visits there in North Africa" , "Suit Ian to be in North African country" , "Land" .)