Crossword Genius

Dress up an untidy tunnel (9)

Ross

I believe the answer is:

underpass

'tunnel' is the definition.
(underpass is a kind of tunnel)

'dress up an untidy' is the wordplay.
'untidy' is an anagram indicator.
'dress'+'up'+'an'='dressupan'
'dressupan' with letters rearranged gives 'UNDERPASS'.

(Other definitions for underpass that I've seen before include "way across road?" , "Tunnel beneath a road" , "way below the level of others making progress" .)

I've seen this clue in The Times.
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