Suffered long after second cat died (9)

'suffered' is the definition.
('stomach' can be a synonym of 'suffer')

'long after second cat died' is the wordplay.
'long' becomes 'ache' (to long for something is to ache for it).
'after' is a charade indicator (letters next to each other).
'second' becomes 's' (common abbreviation).
'cat' becomes 'tom' (a tom is a male cat).
'died' becomes 'd' (abbreviation next to the year of someone's death).
's'+'tom'='stom'
'ache' put after 'stom' is 'stomache'.
'stomache'+'d'='STOMACHED'