Scarcity of baked beans since Jesus was born (7)
I believe the answer is:
absence
'scarcity' is the definition.
(thesaurus)
'baked beans since jesus was born' is the wordplay.
I cannot really see how this works, but
an anagram of 'beans' is 'absen' which is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'of' is the link.
Can you help me to learn more?
(Other definitions for absence that I've seen before include "Cause of fonder heart?" , "form of inattention?" , "Want, lack" , "It's said to make the heart grow fonder" , "Failure to attend" .)