Overcharge master if tree is ordered (9)
I believe the answer is:
profiteer
'overcharge' is the definition.
(I've seen this before)
'master if tree is ordered' is the wordplay.
'master' becomes 'pro' (I've seen this in another clue).
'is ordered' indicates anagramming the letters.
'if'+'tree'='iftree'
'iftree' is an anagram of 'fiteer'.
'pro'+'fiteer'='PROFITEER'
(Other definitions for profiteer that I've seen before include "Racketeer" , "One charging too much" , "Gain excessively from transactions" , "one who makes too much in business" , "Make money unfairly" .)