Charlie breaking wind has ruined lunchtime snack (8)

I believe the answer is:

sandwich

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'lunchtime snack' is the definition.
'sandwich' can be an answer for 'snack' (I've seen this before). I'm not certain of the 'lunchtime' bit.

'charlie breaking wind has ruined' is the wordplay.
'charlie' becomes 'C' (phonetic alphabet).
'breaking' indicates putting letters inside.
'ruined' indicates an anagram.
'wind'+'has'='windhas'
'windhas' anagrammed gives 'sandwih'.
'c' inserted inside 'sandwih' is 'SANDWICH'.

Can you help me to learn more?

(Other definitions for sandwich that I've seen before include "Food between slices" , "Picnic food" , "Pieces of bread with filling" , "Snack named for a lord" , "Filled sponge cake" .)

I've seen this clue in The Independent.

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