Boasts loudly and excessively, reflecting evidence of ageing? (5-4)

'evidence of ageing?' is the definition.
The definition suggests a singular noun which matches the answer.

'boasts loudly and excessively reflecting' is the wordplay.
'boasts' becomes 'crows' (crow is a kind of boast).
'loudly' becomes 'f' (short for forte - 'loud' in music).
'and' is a charade indicator (letters next to each other).
'excessively' becomes 'too' (to too great a degree).
'reflecting' is a reversal indicator.
'too' back-to-front is 'oot'.
'crows'+'f'+'oot'='CROWS-FOOT'

Can you help me to learn more?