Crossword Genius

Come back about worthless dog (5)

Ross

I believe the answer is:

recur

'come back' is the definition.
(recurring is a kind of coming back)

'about worthless dog' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'worthless dog' becomes 'cur' (I've seen this before).
're'+'cur'='RECUR'

(Other definitions for recur that I've seen before include "Happen again (5)" , "Be repeated" , "Return to mind" , "Persist" , "come back to one's mind" .)

I've seen this clue in The Times.
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