Crossword Genius

PC setter or otherwise looking back (10)

Ross

I believe the answer is:

retrospect

'looking back' is the definition.
(I've seen this before)

'pc setter or otherwise' is the wordplay.
'otherwise' indicates anagramming the letters.
'pc'+'setter'+'or'='pcsetteror'
'pcsetteror' is an anagram of 'RETROSPECT'.

(Other definitions for retrospect that I've seen before include "A backward view" , "Hindsight" , "Survey of past events" , "review" , "Look(ing) back" .)

I've seen this clue in The Telegraph.
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