A number are too old for the scope insurance risks (8)
I believe the answer is:
coverage
'the scope insurance risks' is the definition.
I can't judge whether this defines the answer.
'a number are too old' is the wordplay.
'a number' becomes 'C' (C is an example).
'are too old' becomes 'overage' (I've seen this before).
'c'+'overage'='COVERAGE'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for coverage that I've seen before include "Media reporting" , "publicity" , "Press reporting" , "level of press attention" , "News reports" .)