Clue: Hotel on old TV show half-heartedly served up this? (7,5)
Answer: WALDORF SALAD
Explanation: Definition: Hotel on old TV show half-heartedly served up this?
*Waldorf Salad* is an episode of another old TV show Fawlty Towers , in which the salad features
 **WALDORF**="Hotel" + **DAL**[L]**AS**="old TV show" with half of its "heart" or central letters removed, and reversed/"served up"