Waits around to get the measurement (5)
I believe the answer is:
waist
'the measurement' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'waits around' is the wordplay.
'around' indicates an anagram.
'waits' is an anagram of 'WAIST'.
'to get' acts as a link.
Can you help me to learn more?
(Other definitions for waist that I've seen before include "Central part of body" , "Between ribs and hips" , "Spare tyre location?" , "Middle part of the body" , "part of frame" .)