Look: a little vegetable in spring! (10)
I believe the answer is:
appearance
'look' is the definition.
(I have seen 'The look' mean 'appearance' so perhaps 'look' could also mean 'appearance')
'a little vegetable in spring' is the wordplay.
'little vegetable' becomes 'pea' (I've seen this in another clue).
'in' indicates putting letters inside.
'spring' becomes 'prance' (I can't justify this - if you can you should believe this answer much more).
'pea' going into 'prance' is 'ppearance'.
'a'+'ppearance'='APPEARANCE'
Can you help me to learn more?
(Other definitions for appearance that I've seen before include "air" , "Semblance" , "Outward look" , "Look; impression given" , "Act of being present - look" .)