Crossword Genius

Screw up and down (5)

Ross

I believe the answer is:

fluff

This clue is a double definition.

'screw up' is the first definition.
(both can mean to mess something up)

'down?' is the second definition.
(down can mean bird feathers)

'and' acts as a link.

(Other definitions for fluff that I've seen before include "Nap" , "Light downy substance - mistake?" , "Soft downy substance - bungle it" , "blooper" , "Botch" .)

I've seen this clue in The Times and The Independent.
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