Walk in the park to eat out (6)
I believe the answer is:
picnic
'eat out' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for picnic that I've seen before include "Eat out" , "Outdoor snack" , "Informal meal in open air for pleasure" , "Meal eaten outside" , "external courses?" .)