Fish in spot catching current (6)

I believe the answer is:

plaice

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'fish' is the definition.
(I know that plaice is a type of fish)

'in spot catching current' is the wordplay.
'in' means one lot of letters goes inside another.
'spot' becomes 'place' (synonyms).
'catching current' becomes 'i' (symbol for electric current. I am not sure about the 'catching' bit.).
'place' placed around 'i' is 'PLAICE'.

Can you help me to learn more?

(Other definitions for plaice that I've seen before include "Flat fare" , "The fish sounds as if it hits the spot" , "Brown flatfish" , "A fish; sounds like put" , "Swimmer" .)

I've seen this clue in The Telegraph.

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