Divers may use this spear hunting fish (4)

I believe the answer is:

pike

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This might be a double definition.

'divers may use this spear hunting' is the first definition.
'pike' can be an answer for 'spear' (thesaurus). I'm not certain of the remainder of the definition.

'fish' is the second definition.
(pike is a kind of fish)

Can you help me to learn more?

(Other definitions for pike that I've seen before include "Fresh-water fish or old spear" , "Voracious freshwater fish" , "may be hooked" , "Long European freshwater predator" , "Fish - old infantry weapon" .)

I've seen this clue in The Independent.

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