Strutting dance – picnic (8)
I believe the answer is:
cakewalk
I believe this clue is a double definition.
'strutting dance' is the first definition.
(I've seen this in another clue)
'picnic' is the second definition.
(I have seen 'A picnic' mean 'cakewalk' so perhaps 'picnic' could also mean 'cakewalk')
(Other definitions for cakewalk that I've seen before include "Dance based on a march with intricate steps - easy task" , "Easily accomplished task" , "Very easy task - old dance" , "Simple task" , "Easy accomplishment" .)