Raleigh manufactured product used on crops (4,3)

I believe the answer is:

hair gel

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'product used on crops' is the definition.
I can't judge whether this definition defines the answer.

'raleigh manufactured' is the wordplay.
'manufactured' is an anagram indicator.
'raleigh' is an anagram of 'HAIR GEL'.

Can you help me to learn more?

(Other definitions for hair gel that I've seen before include "something for shock?" , "This used to set" , "Application for styling job" , "style fixer" , "Fixer of locks" .)

I've seen this clue in The Sunday Times.

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