Gardener employing Pole holding current degree β one earning a lot for the business (9)
I believe the answer is:
rainmaker
'gardener employing pole holding current degree one' is the definition.
I can't judge whether this defines the answer.
'earning a lot for the business' is the wordplay.
'earning a lot' becomes 'rain' (I can't justify this - if you can you should believe this answer much more).
'for' is a charade indicator (letters next to each other).
'the business' becomes 'maker' (maker is a kind of business).
'rain'+'maker'='RAINMAKER'
Can you help me to learn more?
(Other definitions for rainmaker that I've seen before include "Witch-doctor" , "happy to have cloud over his reputation?" .)