Hot to tuck into tea or Bud (5)
I believe the answer is:
china
'bud' is the definition.
(I've seen this before)
'hot to tuck into tea' is the wordplay.
'hot' becomes 'in' (both can mean fashionable).
'to tuck into' is an insertion indicator.
'tea' becomes 'cha' (cha is a type of tea).
'in' put within 'cha' is 'CHINA'.
'or' is the link.
(Other definitions for china that I've seen before include "The most populous country in the world" , "High quality porcelain" , "Variety of rose" , "Ceramic material" , "Land" .)