Please think about host (9)
I believe the answer is:
entertain
I believe this clue is a triple definition!
'please' is the first definition.
(thesaurus)
'think about' is the second definition.
('entertain' can be a synonym of 'think about')
'host' is the third definition.
(thesaurus)
(Other definitions for entertain that I've seen before include "Wine and dine" , "Create a diversion" , "Welcome" , "nurse" , "Have company" .)