Less crunch on choc-top banana (6)

I believe the answer is:

honcho

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'less' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'crunch on choc-top banana' is the wordplay.
'crunch on' becomes 'hon' (I can't justify this - if you can you should give a lot more credence to this answer).
'top' means to remove the first letter.
'banana' is an anagram indicator (I've seen 'bananas' mean this (informal term for mad)).
'choc' with its first letter taken off is 'hoc'.
'hoc' with letters rearranged gives 'cho'.
'hon'+'cho'='HONCHO'

Can you help me to learn more?

(Other definitions for honcho that I've seen before include "governor" , "Leader (US slang)" .)

I've seen this clue in the Sydney Morning Herald.

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