I got out of tracing that complex timeline plan (5,5)
I believe the answer is:
gantt chart
'i got out of tracing that complex timeline' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'plan' is the wordplay.
I cannot quite understand how this works, but
'plan' could be 'chart' (charting is a kind of planning) and 'chart' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for gantt chart that I've seen is " Diagram for production system".)