Jog naked around the centre of Rugby (5)
I believe the answer is:
nudge
'jog' is the definition.
(I know that jog can be written as nudge)
'naked around the centre of rugby' is the wordplay.
'naked' becomes 'nude' (synonyms).
'around' indicates putting letters inside.
'the centre of' means to look at the middle letters.
The centre of 'rugby' is 'g'.
'nude' going around 'g' is 'NUDGE'.
(Other definitions for nudge that I've seen before include "Facility of pinball machine" , "Gentle push" , "Remind, prompt gently" , "Poke gently with elbow" , "---. ---, wink, wink (Monty Python)" .)