Kit Kat Mini's terribly hidden in cabinet (8)

I believe the answer is:

minister

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'kit kat' is the definition.
The definition suggests a singular noun which matches the answer.

'mini's terribly hidden in cabinet' is the wordplay.
'terribly hidden in cabinet' becomes 'ter' (I can't justify this - if you can you should give a lot more credence to this answer).
'minis'+'ter'='MINISTER'

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(Other definitions for minister that I've seen before include "Form of address" , "parliamentarian" , "Political or religious official" , "Head of a government department" , "Senior politician" .)

I've seen this clue in The Irish Times.

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