Managed to spoil one stanza in it (8)

I believe the answer is:

overseen

'managed' is the definition.
(I've seen this in another clue)

'spoil one stanza in it' is the wordplay.
'spoil' is an anagram indicator.
'stanza' becomes 'verse' (I've seen this before).
'in it' is an insertion indicator.
'one' with letters rearranged gives 'oen'.
'oen' placed around 'verse' is 'OVERSEEN'.

'to' is the link.

(Another definition for overseen that I've seen is " Supervised".)

I've seen this clue in the Evening Standard.

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