Love a rye — buy supply, with permission from you (2,4,5)

I believe the answer is:

by your leave

'with permission from you' is the definition.
(by your leave means with your permission)

'love a rye buy supply' is the wordplay.
'supply' indicates an anagram (in a supple way).
'love'+'a'+'rye'+'buy'='lovearyebuy'
'lovearyebuy' is an anagram of 'BY-YOUR-LEAVE'.

(Another definition for by your leave that I've seen is " If I may".)

I've seen this clue in The Times.

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