Ridiculous way to stop leaders in union ruining deal (6)
I believe the answer is:
absurd
'ridiculous' is the definition.
('absurd' can be a synonym of 'ridiculous')
'stop leaders in union ruining deal' is the wordplay.
'stop' becomes 'abs' (I am not sure about this - if you are sure you should believe this answer much more).
'leaders in' says to take the initial letters.
The initial letters of 'union ruining deal' is 'urd'.
'abs'+'urd'='ABSURD'
'way to' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for absurd that I've seen before include "Derisory, preposterous" , "Wildly illogical" , "Quite ridiculous, silly" , "'Ridiculous, silly (6)'" , "Really ridiculous, silly" .)