Senior has boiled rice regularly (5)
I believe the answer is:
oldie
'senior' is the definition.
(I've seen this before)
'boiled rice regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'boiled'+'rice'='boiledrice'
The alternating letters of 'boiledrice' are 'OLDIE'.
'has' is the link.
(Other definitions for oldie that I've seen before include "Song of yesteryear" , "classic film perhaps" , "Person of a certain age?" , "pensioner" , "One getting on" .)