Fun to break furniture (5)
I believe the answer is:
futon
'furniture' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'fun to break' is the wordplay.
'break' indicates putting letters inside (inserted letters break into the word).
'fun' placed around 'to' is 'FUTON'.
Can you help me to learn more?
(Other definitions for futon that I've seen before include "A Japanese mattress-bed" , "Japanese-style mattress" , "Japanese quilted mattress used as bed" , "Kind of Japanese chair-bed" , "Sleep on it" .)