Tiresome noise from unhappy baby changing sides in cot (6)

I believe the answer is:
trying
'tiresome' is the definition.
(trying can mean annoying or tiresome)
'noise from unhappy baby changing sides in cot' is the wordplay.
I cannot really see how this works, but
'from' could be 'in' (I've seen this in other clues) and 'in' 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?
(Other definitions for trying that I've seen before include "Testing" , "irksome" , "Essaying" , "Difficult - annoying" , "Making attempts" .)
