Crossword Genius

Lock editor up, fool? (7)

Ross

I believe the answer is:

dessert

'fool?' is the definition.
(fool is a type of dessert)

'lock editor up' is the wordplay.
'lock' becomes 'tress' (both can mean a piece of hair).
'editor' becomes 'ed' (abbreviation).
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'tress'+'ed'='tressed'
'tressed' in reverse letter order is 'DESSERT'.

(Other definitions for dessert that I've seen before include "Christmas pudding maybe" , "Spotted Dick is one" , "Fruit and nuts, perhaps" , "tart?" , "Sweet, afters" .)

I've seen this clue in The Telegraph.
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