To do so won't get you much approbation (3)
I believe the answer is:
rob
'to do so won't get you' is the definition.
I can't tell whether this defines the answer.
'much approbation' is the wordplay.
'much' indicates a hidden word (many of the letters in the clue).
'ROB' is hidden in the letters of 'approbation'.
Can you help me to learn more?
(Other definitions for rob that I've seen before include "Hold up" , "Thieve" , "Steal from (someone)" , "Take without consent from the owner" , "boy's name" .)