Hair (5)

'hair' is the definition.
(locks can mean hair)
This is the entire clue.
(Other definitions for locks that I've seen before include "Door fasteners" , "Tresses" , "Secure fasteners for doors" , "Securely fixes" , "Fastens - hair" .)
(Other definitions for tie that I've seen before include "Accessory" , "may make one hot under the collar" , "Bond; draw" , "Get even" , "Neckpiece" .)