Record of events reflecting your financial support (5)
I believe the answer is:
diary
'record of events' is the definition.
(I've seen this before)
'reflecting your financial support' is the wordplay.
'reflecting' shows that the letters should be reversed in order.
'your' becomes 'yr' (shortened version of 'your' in eg textspeak).
'financial support' becomes 'aid' (I've seen this in another clue).
'yr'+'aid'='yraid'
'yraid' back-to-front is 'DIARY'.
(Other definitions for diary that I've seen before include "Daily written record of experiences" , "Pepys' daily record" , "Pepys's record" , "Appointment book" , "Daily record of personal activity" .)