Death ultimately captured by tormented Yeats, for example, in common parlance (2,4,3)
I believe the answer is:
as they say
'common parlance' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'death ultimately captured by tormented yeats for example' is the wordplay.
'ultimately' suggests the final letters.
'captured by' is an insertion indicator.
'tormented' is an anagram indicator.
'for example' becomes 'say' ('say' can be used to introduce an example).
The last letter of 'death' is 'h'.
'yeats' with letters rearranged gives 'astey'.
'h' going within 'astey' is 'asthey'.
'asthey'+'say'='AS THEY SAY'
'in' is the link.
Can you help me to learn more?