Come out in the garden, friend! (3)
I believe the answer is:
bud
'friend' is the definition.
(shortly for buddy)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for bud that I've seen before include "mate in America" , "Flower yet to open" , "Friend" , "Small pre-flower knob - nip it" , "American beer" .)