Headdress seen in trip abroad regularly (5)
I believe the answer is:
tiara
'headdress' is the definition.
(tiara is a kind of headdress)
'trip abroad regularly' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'trip'+'abroad'='tripabroad'
The alternating letters of 'tripabroad' are 'TIARA'.
'seen in' acts as a link.
(Other definitions for tiara that I've seen before include "Half a crown!" , "Jewelled, ornamental headgear" , "it goes to one's head!" , "Jewelled headband" , "Decorative headband" .)