Condiment very popular with English on fish (7)
I believe the answer is:
vinegar
'condiment' is the definition.
(vinegar is a kind of condiment)
'very popular with english on fish' is the wordplay.
'very' becomes 'v' (abbreviation).
'popular' becomes 'in'.
'with' says to put letters next to each other.
'english' becomes 'e' (abbreviation).
'on fish' becomes 'gar' (gar is a kind of fish. I am not sure about the 'on' bit.**).
'v'+'in'+'e'+'gar'='VINEGAR'
Can you help me to learn more?
(Other definitions for vinegar that I've seen before include "Acidic condiment" , "Sour liquid used as condiment" , "Pickling medium" , "Acetic acid" , "Pickling agent" .)