Crossword Genius

It's bad when there's a missing part (3)

Ross

I believe the answer is:

sin

'it's bad' is the definition.
(thesaurus)

'there's a missing part' is the wordplay.
'part' indicates a hidden word.
'SIN' can be found hidden inside 'theres missing'.

'when' is the link.

(Other definitions for sin that I've seen before include "Immoral action" , "Breach of moral law" , "Mortal error" , "Evil" , "Serious error" .)

I've seen this clue in the Evening Standard.
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