Forward and back, witch's cat (12)

I believe the answer is:

overfamiliar

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'forward' is the definition.
(similar in meaning)

'back witch's cat' is the wordplay.
'back' becomes 'over' (I am not sure about this - if you are sure you should believe this answer much more).
'witch's cat' becomes 'familiar' (I've seen this before).
'over'+'familiar'='OVERFAMILIAR'

'and' acts as a link.

Can you help me to learn more?

(Another definition for overfamiliar that I've seen is " Too well known".)

I've seen this clue in The Everyman puzzle in The Observer.

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