Barnet seals? (5)
I believe the answer is:
locks
This clue is a double definition.
'barnet' is the first definition.
(both can mean hair)
'seals?' is the second definition.
(Other definitions for locks that I've seen before include "Clusters of hair" , "Door fasteners" , "Secures; person's hair" , "raising devices for sailors" , "Tresses" .)