Cringe seeing nasty spill on playground (6)
I believe the answer is:
recoil
'cringe' is the definition.
(I know that cringe can be written as recoil)
'nasty spill on playground' is the wordplay.
'nasty spill' becomes 'oil' (I can't justify this - if you can you should believe this answer much more).
'on' means one lot of letters go next to another.
'playground' becomes 'rec' (short for recreation ground).
'oil' put after 'rec' is 'RECOIL'.
'seeing' acts as a link.
Can you help me to learn more?
(Other definitions for recoil that I've seen before include "Move or spring back suddenly, perhaps in disgust" , "Quail is here!" , "Jump back" , "Kick of gun" , "Reaction to being fired" .)