Scrap radio without spirit (5)
I believe the answer is:
crumb
'scrap' is the definition.
(I've seen this in another clue)
'radio without spirit' is the wordplay.
'radio' becomes 'cb' (I can't justify this - if you can you should believe this answer much more).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'spirit' becomes 'rum' (alcoholic spirit).
'cb' going around 'rum' is 'CRUMB'.
Can you help me to learn more?
(Other definitions for crumb that I've seen before include "Small piece of e.g. bread or cake" , "tiny amount" , "Tiny piece of bread or cake" , "Small morsel" , "Dry morsel" .)