### Clue: Slogan greeting pair of bachelors in hotel's changed (10)
### Answer: SHIBBOLETH 
 ### Explanation: Definition: Slogan
 [ HI(an informal greeting) + B,B(a pair of abbrevs. for "bachelor") ] **contained in**(in) **anagram of**(…'s changed) HOTEL'S.
Defn: … distinctive of a particular group or class of people.