Excellent bet for the boss position (6)
I believe the answer is:
tiptop
'excellent' is the definition.
(I've seen this before)
'bet for the boss position' is the wordplay.
I cannot really understand how this works, but
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is found within the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for tiptop that I've seen before include "Excellent, super" , "First-rate" , "Jolly good, excellent" , "Very fine" , "Best of its kind" .)