Vicious perhaps to return letter showing no consideration (10)

I believe the answer is:

dismissive

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'vicious perhaps to return letter showing no consideration' is the definition.
I can't tell whether this definition defines the answer.

'vicious perhaps to return letter' is the wordplay.
'vicious perhaps' becomes 'Sid' (Sid Vicious).
'to return' is a reversal indicator.
'letter' becomes 'missive' (synonyms).
'sid' back-to-front is 'dis'.
'dis'+'missive'='DISMISSIVE'

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(Other definitions for dismissive that I've seen before include "Disdainful" , "rebuffing me?" , "contemptuous" , "sneering?" .)

I've seen this clue in The Times.

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