Crossword Genius

Go fishing, inexperienced in tidal environs (5)

Ross

I believe the answer is:

trawl

I'm a little stuck... Click here to teach me more about this clue!

'go fishing' is the definition.
(I've seen this before)

'inexperienced in tidal environs' is the wordplay.
'inexperienced' becomes 'raw' (similar in meaning).
'in' means one lot of letters goes inside another.
'tidal environs' becomes 'tl' (I can't justify this - if you can you should give a lot more credence to this answer).
'raw' inserted within 'tl' is 'TRAWL'.

Can you help me to learn more?

(Other definitions for trawl that I've seen before include "hunt" , "Drag nets" , "Fishermen may use it" , "Fish with a large net" , "Net dragged behind fishing boats" .)

I've seen this clue in the Sydney Morning Herald.
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