Appear so excited about old TV show (4,5)
I believe the answer is:
soap opera
'tv show' is the definition.
(I've seen this before)
'appear so excited about old' is the wordplay.
'excited' indicates an anagram.
'about' indicates putting letters inside.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'appear'+'so'='appearso'
'appearso' is an anagram of 'sapopera'.
'sapopera' enclosing 'o' is 'SOAP-OPERA'.
(Other definitions for soap opera that I've seen before include "TV programme" , "Melodramatic TV serial" , "Fair City or Coronation Street, say" , "TV drama series" , "Sentimental TV serial, sounds clean" .)