Crossword Genius

Boss less sensitive dealing with termination of workforce (6,3)

Ross

I believe the answer is:

number one

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'boss' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

'less sensitive dealing with termination of workforce' is the wordplay.
'less sensitive' becomes 'number' (numb means insensitive or unfeeling).
'dealing with' becomes 'on'.
'termination of' suggests the final letters (the letter which terminates the word).
The final letter of 'workforce' is 'e'.
'number'+'on'+'e'='NUMBER ONE'

Can you help me to learn more?

(Other definitions for number one that I've seen before include "Musical success" , "Cut" , "Naval first lieutenant; foremost person/thing" , "top-selling record" , "Wee" .)

I've seen this clue in The Independent.
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