Stones legendary bird adjacent to outskirts of kennels (5)
I believe the answer is:
rocks
'stones' is the definition.
('rock' can be a synonym of 'stone')
'legendary bird adjacent to outskirts of kennels' is the wordplay.
'legendary bird' becomes 'roc' (I've seen this before).
'adjacent to' says to put letters next to each other.
'outskirts of' suggests removing the centre.
'kennels' with its centre taken out is 'ks'.
'roc'+'ks'='ROCKS'
(Other definitions for rocks that I've seen before include "is brilliant" , "Ice" , "Boulders" , "Lumps of hard mineral matter" , "cocaine?" .)