Person who goes fishing showing fury about lake (6)

I believe the answer is:

angler

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'person who goes fishing' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I can't see?

'fury about lake' is the wordplay.
'fury' becomes 'anger' (fury is intense anger).
'about' is an insertion indicator.
'lake' becomes 'L' (geographical abbreviation).
'anger' placed around 'l' is 'ANGLER'.

'showing' is the link.

Can you help me to learn more?

(Other definitions for angler that I've seen before include "Isaac Walton wrote of the 'Compleat' one" , "Walton's was Compleat" , "Sportsman" , "who looks for compliments" , "One proverbially exaggerating" .)

I've seen this clue in The Daily Express.

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