Hamper the perfidious Goth, that is (6)

I believe the answer is:

hogtie

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'hamper' is the definition.
Although both the answer and definition are verbs in their base form, I cannot understand how one could define the other.

'perfidious goth that is' is the wordplay.
'perfidious' is an anagram indicator.
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'goth' with letters rearranged gives 'hogt'.
'hogt'+'ie'='HOGTIE'

'the' acts as a link.

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I've seen this clue in the Evening Standard.

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