Demanding car rental? (4,2,6)

I believe the answer is:

hard to please

'demanding' is the definition.
(similar in meaning)

'car rental?' is the wordplay.
'car' becomes 'hardtop' (hardtop is a kind of car).
'rental?' becomes 'lease' (synonyms).
'hardtop'+'lease'='HARD-TO-PLEASE'

(Another definition for hard to please that I've seen is " Overparticular".)

I've seen this clue in The Times.

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