What you'll see at funfairs - old clown getting crazy (8)
I believe the answer is:
coconuts
'what you'll see at funfairs old' is the definition.
I can't judge whether this definition defines the answer.
'clown getting crazy' is the wordplay.
'clown' becomes 'coco' (Nicolai Poliakoff aka Coco the Clown).
'getting' says to put letters next to each other.
'crazy' becomes 'nuts' (nuts can informally mean crazy or mad).
'coco'+'nuts'='COCONUTS'
Can you help me to learn more?
(Other definitions for coconuts that I've seen before include "No stucco on these hard fruits" , "Milky fruits" , "Large, hard-shelled oval husks" , "Large hairy husks" , "Large oval nuts with fibrous husks" .)