Where to rest an arm or leg, love (5)
I believe the answer is:
limbo
'where to rest an arm' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'leg love' is the wordplay.
'leg' becomes 'limb' (I've seen this before).
'love' becomes 'o' (love means zero in tennis).
'limb'+'o'='LIMBO'
'or' is the link.
Can you help me to learn more?
(Other definitions for limbo that I've seen before include "waiting time" , "Under-bar dance" , "dance in West Indies" , "Period of uncertainty" , "Place of suspense" .)