Sort of nut that is loose maybe (5)

I believe the answer is:

untie

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'loose maybe' is the definition.
'untie' can be an answer for 'loose' (loose can mean to untie or unleash). I'm unsure of the 'maybe' bit.

'sort of nut that is' is the wordplay.
'sort of' indicates an anagram.
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'nut' is an anagram of 'unt'.
'unt'+'ie'='UNTIE'

Can you help me to learn more?

(Other definitions for untie that I've seen before include "Separate" , "Release, loosen" , "Release bindings or shoelaces" , "Let loose" , "Remove fastenings from" .)

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

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