Small saloon requiring treatment for wood rot (3-4)

I believe the answer is:

two-door

'small saloon' is the definition.

'treatment for wood rot' is the wordplay.
'treatment for' is an anagram indicator (I've seen this in other clues).
'wood'+'rot'='woodrot'
'woodrot' is an anagram of 'TWO-DOOR'.

'requiring' acts as a link.

I've seen this clue in The Independent.

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