Crossword Genius

Add to set brought back (3,2)

Ross

I believe the answer is:

tot up

'add' is the definition.
('tot up' can be a synonym of 'add')

'to set brought back' is the wordplay.
'set' becomes 'put' ('put' can be a synonym of 'set').
'brought back' says the letters should be written backwards.
'put' back-to-front is 'tup'.
'to'+'tup'='TOT UP'

(Other definitions for tot up that I've seen before include "Do summer job" , "Reckon" , "Add together (driving offences)" , "Add (some numbers)" , "Sum - total" .)

I've seen this clue in The Telegraph.
Want a hint initially instead of a full solution? Install my app