Jogger perhaps stirring below (5)
I believe the answer is:
elbow
'jogger' is the definition.
(an elbow can be used to jog someone)
'stirring below' is the wordplay.
'stirring' indicates anagramming the letters.
'below' anagrammed gives 'ELBOW'.
'perhaps' acts as a link.
(Other definitions for elbow that I've seen before include "Hinged joint" , "Arm joint, more power to it" , "Sort of grease" , "Dismissal?" , "given to one about to leave" .)