Untwisting the line before it ends game fishing (13)

I believe the answer is:

disentangling

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'untwisting the line before' is the definition.
I can't judge whether this definition defines the answer.

'it ends game fishing' is the wordplay.
'game' indicates anagramming the letters (the letters play around).
'fishing' becomes 'angling' ('angle' can be a synonym of 'fish').
'it'+'ends'='itends'
'itends' is an anagram of 'disent'.
'disent'+'angling'='DISENTANGLING'

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

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