Definitely not taking funny money in bars (2,2,5)
I believe the answer is:
by no means
'definitely not' is the definition.
(I've seen this before)
'funny money in bars' is the wordplay.
'funny' indicates an anagram.
'in' means one lot of letters goes inside another.
'bars' becomes 'bans' (I've seen this in other clues).
'money' is an anagram of 'ynome'.
'ynome' put inside 'bans' is 'BY NO MEANS'.
'taking' acts as a link.
(Other definitions for by no means that I've seen before include "Certainly not, not in any way" , "Forbids" , "Certainly not, perish the thought" , "Without using any method" , "Definitely not" .)