Alfresco meal and walk in park (6)
I believe the answer is:
picnic
I believe this is a double definition.
'alfresco meal' is the first definition.
(an alfresco meal is eaten outside)
'walk in park?' is the second definition.
(both can mean something very easy)
'and' acts as a link.
(Other definitions for picnic that I've seen before include "Outdoor repast" , "something easy to do" , "Alfresco repast" , "food for consumption outside" , "Outdoor meal (that's easy?)" .)