Sidles around the perimeter? (5)
I believe the answer is:
edges
I believe this clue is a double definition.
'sidles' is the first definition.
(I've seen this in another clue)
'the perimeter?' is the second definition.
(I've seen this in another clue)
'around' is the link.
(Other definitions for edges that I've seen before include "Borders, rims" , "Slowly moves" , "Inches" , "Bounds" , "Sharpened sides of knives etc" .)