Unsettling bees can create such scarcity (7)
I believe the answer is:
absence
'such scarcity' is the definition.
'absence' can be an answer for 'scarcity' (thesaurus). I'm not certain of the 'such' bit.
'unsettling bees can' is the wordplay.
'unsettling' indicates an anagram.
'bees'+'can'='beescan'
'beescan' is an anagram of 'ABSENCE'.
'create' is the link.
Can you help me to learn more?
(Other definitions for absence that I've seen before include "What supposedly makes the heart grow fonder?" , "It makes the heart grow fonder, they say" , "Non-attendance" , "Non-presence" , "It may make the heart grow fonder" .)