Shrub that stays small with carbon's aid to some extent (6)
I believe the answer is:
bonsai
'shrub that stays small' is the definition.
'bonsai' can be an answer for 'shrub' (I have seen 'Japanese shrub' mean 'bonsai' so perhaps 'shrub' could also mean 'bonsai'). I'm unsure of the remainder of the definition.
'with carbon's aid to some extent' is the wordplay.
'to some extent' indicates the answer is hidden within the clue.
'BONSAI' is hidden in the letters of 'with carbons aid'.
Can you help me to learn more?
(Other definitions for bonsai that I've seen before include "stunted growth" , "Japanese art of growing dwarf plants" , "Japanese art of growing miniature trees" , "Dwarf tree found in Bosnia" , "Dwarf tree cultivation" .)