Subsequent events end in a religious expression I let loose (9)
I believe the answer is:
aftermath
'subsequent events' is the definition.
'end in a religious expression i let loose' is the wordplay.
'end' becomes 'term' (I've seen this before**).
'in' indicates putting letters inside.
'religious expression' becomes 'faith'.
'let loose' is a deletion indicator.
'faith' with 'i' taken out is 'fath'.
'a'+'fath'='afath'
'term' inserted inside 'afath' is 'AFTERMATH'.
(Other definitions for aftermath that I've seen before include "Repercussions" , "End" , "What may be the later consequences" , "Consequences of a bad event" , "Results, often of something bad" .)