Half-heartedly stagger round the bend (5)
I believe the answer is:
elbow
'the bend' is the definition.
(elbow is a kind of bend)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for elbow that I've seen before include "Hinged joint" , "Major arm joint" , "Reject" , "Sort of grease" , "Barge" .)