Household of chaps facing senility (6)
I believe the answer is:
menage
'household' is the definition.
('menage' can be a synonym of 'household')
'chaps facing senility' is the wordplay.
'chaps' becomes 'men' (I've seen this before).
'facing' is a charade indicator (letters next to each other).
'senility' becomes 'age' (I've seen this in other clues).
'men'+'age'='MENAGE'
'of' is the link.
(Other definitions for menage that I've seen before include "live together" , "Persons of household" , "family group" , "Social unit living together" , "Members of a household" .)