It may be found at the end of the line (4,4)

I believe the answer is:

fish hook

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'it may be found at' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'end of the line' is the wordplay.
'end of the' becomes 'fish' (I can't explain this - if you can you should believe this answer much more).
'line' becomes 'hook' (hook is a kind of line).
'fish'+'hook'='FISH-HOOK'

'the' acts as a link.

Can you help me to learn more?

I've seen this clue in The Globe and Mail.

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