Tree as regularly picked (3)
I believe the answer is:
tea
'tree as regularly picked' is the definition.
I can't tell whether this definition defines the answer.
'tree as regularly' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'tree'+'as'='treeas'
The alternating letters of 'treeas' are 'TEA'.
Can you help me to learn more?
(Other definitions for tea that I've seen before include "Hot beverage" , "Light afternoon meal" , "Perhaps Indian" , "Char" , "Elevenses" .)