Crossword Genius

Fish love jargon (5)

Ross

I believe the answer is:

lingo

'jargon' is the definition.
(I know that jargon can be written as lingo)

'fish love' is the wordplay.
'fish' becomes 'ling' (ling is a kind of fish).
'love' becomes 'o' (love means zero in tennis).
'ling'+'o'='LINGO'

(Other definitions for lingo that I've seen before include "Language (slang)" , "French?" , "Patois" , "Jargon, foreign language (informal)" , "Language, colloquially speaking." .)

I've seen this clue in The Guardian.
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