Useless clobber? (4)
I believe the answer is:
duds
'useless clobber?' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'useless clobber?' is the wordplay.
'useless' becomes 'dud' (I've seen this before).
'clobber?' becomes 's' (I can't explain this - if you can you should give a lot more credence to this answer).
'dud'+'s'='DUDS'
Can you help me to learn more?
(Other definitions for duds that I've seen before include "Bombs that fail to explode" , "Failures; clothes" , "One assumes them" .)