100 and too old for insurance protection (8)
I believe the answer is:
coverage
'insurance protection' is the definition.
'coverage' can be an answer for 'protection' (coverage is a kind of protection). I'm not sure about the 'insurance' bit.
'100 and too old' is the wordplay.
'100' becomes 'C' (Roman numeral).
'and' means one lot of letters go next to another.
'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 "Commentary" , "Treatment (of an issue) by the media" , "news attention" , "level of press attention" , "publicity" .)