Make an effort coming up with a tune (6)
I believe the answer is:
strain
This might be a double definition.
'make an effort' is the first definition.
(I've seen this before)
'tune' is the second definition.
(I know that tune can be written as strain)
'coming up with a' is the link.
This may not be correct. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for strain that I've seen before include "Trace" , "Tension and exertion" , "Trains under stress and pressure" , "Overtax; tension" , "Noted" .)