Look exhausted and fall out of the ring (5)
I believe the answer is:
droop
'look exhausted' is the definition.
I can't judge whether this definition defines the answer.
'fall out of the ring' is the wordplay.
'fall' becomes 'drop' (dropping is a kind of falling).
'out of' means one lot of letters goes inside another.
'the ring' becomes 'o'.
'drop' placed around 'o' is 'DROOP'.
'and' is the link.
Can you help me to learn more?
(Other definitions for droop that I've seen before include "Sag downwards" , "lose heart" , "Go limp" , "Become limp" , "Flag" .)