Crossword Genius

Underground omen about timepiece (9)

Ross

I believe the answer is:

metronome

'timepiece' is the definition.
(thesaurus)

'underground omen about' is the wordplay.
'underground' becomes 'metro' (synonyms).
'about' indicates an anagram.
'omen' with letters rearranged gives 'nome'.
'metro'+'nome'='METRONOME'

(Other definitions for metronome that I've seen before include "Musician's timekeeper" , "Instrument for beating time in music" , "Device that sounds tempo for music practice" , "A pacemaker" , "Musical timekeeper" .)

I've seen this clue in The Daily Express.
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