The craze for cash in the case of a minor injury (4)
I believe the answer is:
cult
'the craze' is the definition.
(synonyms)
'for cash in the case of a minor injury' is the wordplay.
'for' becomes 'u' (I am not sure about this - if you are sure you should believe this answer much more).
'cash' becomes 'L' (The pound sterling symbol is an elaborate L).
'in' means one lot of letters goes inside another.
'the case of' suggests removing the centre (outsides of).
'a minor injury' becomes 'cut' (I've seen this before).
'cut' with its centre taken out is 'ct'.
'u'+'l'='ul'
'ul' inserted within 'ct' is 'CULT'.
Can you help me to learn more?
(Other definitions for cult that I've seen before include "Esoteric religion" , "Narrow religious sect" , "Strange religious group" , "Group with system of formal worship" , "Extremist religion" .)