A bit that gets cast? (4)
I believe the answer is:
bait
'a bit that gets cast?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'a bit that gets cast?' is the wordplay.
'that gets cast?' indicates an anagram (letters are cast around).
'a'+'bit'='abit'
'abit' anagrammed gives 'BAIT'.
Can you help me to learn more?
(Other definitions for bait that I've seen before include "N in radio comms" , "Enticement, lure" , "Allurement" , "Worms, for example" , "Food to entice fish; taunt" .)