Track to follow around run (5)
I believe the answer is:
trail
'track' is the definition.
(I've seen this before)
'follow around run' is the wordplay.
'follow' becomes 'tail' (I've seen this before).
'around' means one lot of letters goes inside another.
'run' becomes 'r' (cricket abbreviation).
'tail' going around 'r' is 'TRAIL'.
'to' is the link.
(Other definitions for trail that I've seen before include "Path or track through wild or hilly country" , "Beaten path; track" , "advertise upcoming programmes" , "Beaten path through the countryside" , "Track or scent used in following someone" .)