Free wild mantled lemur (12)

I believe the answer is:

untrammelled

'free' is the definition.

'wild mantled lemur' is the wordplay.
'wild' indicates an anagram.
'mantled'+'lemur'='mantledlemur'
'mantledlemur' is an anagram of 'UNTRAMMELLED'.

(Other definitions for untrammelled that I've seen before include "Not restricted or hampered" , "With complete freedom of action" .)

I've seen this clue in The Guardian.

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