Like virgin territory with mud planter managed (10)

I believe the answer is:

untrampled

'like virgin territory' is the definition.
(not trampled on or trodden on)

'with mud planter managed' is the wordplay.
'with' means one lot of letters go next to another.
'managed' indicates an anagram.
'mud' next to 'planter' is 'mudplanter'.
'mudplanter' is an anagram of 'UNTRAMPLED'.

I've seen this clue in The Guardian.

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