Seabird using the front regularly (4)
I believe the answer is:
tern
'seabird' is the definition.
(tern is a kind of seabird)
'the front regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'the'+'front'='thefront'
The alternating letters of 'thefront' are 'TERN'.
'using' acts as a link.
(Other definitions for tern that I've seen before include "Winger" , "Gull-like seabird" , "Small gull with forked tail" , "Rent out this gull" , "Gull-like sea bird" .)