Substitute pamphlet editor took away (10)

I believe the answer is:

subtracted

'took away' is the definition.
(to subtract is to take away)

'substitute pamphlet editor' is the wordplay.
'substitute' becomes 'sub' (synonyms).
'pamphlet' becomes 'tract' (synonyms).
'editor' becomes 'ed' (abbreviation).
'sub'+'tract'+'ed'='SUBTRACTED'

I've seen this clue in The Telegraph.

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