Persian prophet raised lightweight chicken for cooking (9)

I believe the answer is:

zoroaster

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'persian prophet' is the definition.
(I've seen this in another clue)

'raised lightweight chicken for cooking' is the wordplay.
'raised' is a reversal indicator (going up in a down clue).
'lightweight' becomes 'oz' (abbreviation for ounce, a light weight).
'chicken for cooking' becomes 'roaster' (I can't justify this - if you can you should believe this answer much more).
'oz' reversed gives 'zo'.
'zo'+'roaster'='ZOROASTER'

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(Other definitions for zoroaster that I've seen before include "Religious leader" , "Persian prophet" .)

I've seen this clue in The Times.

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