Working in a group that has no leader (6)
I believe the answer is:
action
'working' is the definition.
(thesaurus)
'in a group that has no leader' is the wordplay.
I cannot really see how this works, but
'a' is present in the answer.
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is present in the answer.
'in' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for action that I've seen before include "It is said to speak louder than words" , "Litigation" , "Director's call" , "Watch operating mechanism" , "Take proceedings" .)