Sound from an old floorboard (5)
I believe the answer is:
creak
'sound from an old floorboard' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for creak that I've seen before include "Audibly reveal weakness under strain" , "Squeaking sound" , "Unoiled hinge sound" , "Groan (like a loose floorboard)" , "Screech, grate" .)