Money detectives at last appearance of The Clash, date-wise (8)
I believe the answer is:
coincide
'the clash date-wise' is the definition.
(if things coincide they happen at the same tim)
'money detectives at last appearance' is the wordplay.
'money' becomes 'coin' (I've seen this before).
'detectives' becomes 'CID' (abbreviation for Criminal Investigation Department).
'at last' says to take the final letters.
The last letter of 'appearance' is 'e'.
'coin'+'cid'+'e'='COINCIDE'
'of' is the link.
(Other definitions for coincide that I've seen before include "Occur simultaneously" , "Happen simultaneously" , "Happen together" , "Show correspondence" , "Happen at the same time in unplanned way" .)