Fancy better edible grains (7)

I believe the answer is:

caprice

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

'fancy' is the definition.
(I've seen this before)

'better edible grains' is the wordplay.
'better' becomes 'cap' (both can mean to beat somebody else's attempt).
'edible grains' becomes 'rice' (I've seen this before. I am not sure about the 'edible' bit.).
'cap'+'rice'='CAPRICE'

Can you help me to learn more?

(Other definitions for caprice that I've seen before include "Sudden change of mind" , "Sudden mood change" , "A whim or piece of fancy" , "unaccountable change" , "'Impulse, whim (7)'" .)

I've seen this clue in The Telegraph.

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