Fanatical bishop at centre of attack (5)

I believe the answer is:

rabid

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'fanatical' is the definition.
('rabid' can be a synonym of 'fanatical')

'bishop at centre of attack' is the wordplay.
'bishop at' becomes 'rabi' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'centre of' indicates the central letters.
'attack' becomes 'sandbag' (I've seen this before).
The central letter of 'sandbag' is 'd'.
'rabi'+'d'='RABID'

Can you help me to learn more?

(Other definitions for rabid that I've seen before include "Mad; raging" , "Extreme, fanatical" , "Furious like mad dog?" , "Fanatical - hydrophobic" , "Affected by hydrophobia" .)

I've seen this clue in The Telegraph.

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