One’s stuck in quagmire, the story of my life (4)
I believe the answer is:
biog
'life' is the definition.
(I've seen this before)
'one's stuck in quagmire' is the wordplay.
'one' becomes 'i' (Roman numeral).
'stuck in' is an insertion indicator.
'quagmire' becomes 'bog' (I've seen this before).
'i' going inside 'bog' is 'BIOG'.
'the story of my' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for biog that I've seen before include "personal account" , "Short life" .)