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Nothing in beer a clergyman brought up that's used as moisturising agent (4,4)

Ross

I believe the answer is:

aloe vera

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'moisturising agent' is the definition.
(substance with a moisturising effect)

'nothing in beer a clergyman brought up' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'in' indicates putting letters inside.
'beer' becomes 'ale' (type of beer).
'clergyman' becomes 'rev' (I've seen this before).
'brought up' is a reversal indicator (in a down clue, letters go up).
'a'+'rev'='arev'
'arev' backwards is 'vera'.
'o' inserted into 'ale' is 'aloe'.
'aloe'+'vera'='ALOE VERA'

'that's used as' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for aloe vera that I've seen before include "cosmetic preparation" , "Something soothing" , "Plant substance used in cosmetics" , "Medicinal plant" , "type of juice" .)

I've seen this clue in The Telegraph.
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