Crossword Genius

Golf does perhaps upset huge appetite (5)

Ross

I believe the answer is:

greed

I'm a little stuck... Click here to teach me more about this clue!

'huge appetite' is the definition.
'greed' can be an answer for 'appetite' (thesaurus). I'm not sure about the 'huge' bit.

'golf does perhaps upset' is the wordplay.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'does perhaps' becomes 'deer' (I've seen this in another clue).
'upset' says the letters should be written backwards.
'deer' backwards is 'reed'.
'g'+'reed'='GREED'

Can you help me to learn more?

(Other definitions for greed that I've seen before include "Craving" , "Vice" , "Avidity" , "Avarice, cupidity" , "Immoderate desire" .)

I've seen this clue in The Telegraph.
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