Meal outdoors (6)
I believe the answer is:
picnic
'meal outdoors' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for picnic that I've seen before include "Easy task - outdoor event" , "Informal meal in open air for pleasure" , "Outdoor meal (that's easy?)" , "Informal outdoor summer meal" , "outdoor eating" .)