Crossword Genius

Sing terrible corn about nothing (5)

Ross

I believe the answer is:

croon

'sing' is the definition.
(crooning is a kind of singing)

'terrible corn about nothing' is the wordplay.
'terrible' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'nothing' becomes 'o' (looks like zero - 0).
'corn' with letters rearranged gives 'cron'.
'cron' enclosing 'o' is 'CROON'.

(Other definitions for croon that I've seen before include "Sing like Bing" , "Sing softly" , "Sing in a soft low tone" , "Sing with a soft voice" .)

I've seen this clue in The Mirror.
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