Crossword Genius

What babies need: rest before food (7)

Ross

I believe the answer is:

nappies

'what babies need' is the definition.
(babies wear nappies)

'rest before food' is the wordplay.
'rest' becomes 'nap' (a nap is a short sleep).
'before' means one lot of letters go next to another.
'food' becomes 'pies' (pies are a type of food).
'nap'+'pies'='NAPPIES'

(Other definitions for nappies that I've seen before include "Baby's pads" , "What Americans call diapers" , "Covers" , "Cloths for babies" , "They're diapers in America" .)

I've seen this clue in The Times.
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