Capacity to please (7)
I believe the answer is:
content
I believe this is a double definition.
'capacity' is the first definition.
(I know that capacity can be written as content)
'please' is the second definition.
(thesaurus)
'to' is the link.
(Other definitions for content that I've seen before include "Satisfied; volume" , "Gist" , "what's included" , "substance of book?" , "Satisfied - subject matter" .)