Possible Clues:

• Easy pickings, and a hint to the four other longest Down answers
• Cherries, say, growing in hatfuls, unexpectedly not small
• Easy pickings, and a feature of 4-, 9-, 17- and 23-Down
• Something that can be easily acquired or achieved
• Easiest-to-do objectives
• Easily achieved goals
• Easy orchard pickings
• Simple things to pick ... or what 5-, 11-, 29- and 38-Down have?
• Unfailing growth that could provide easy pickings
• It may be picked first