On yacht without husband? It's a riotous holiday (10)
I believe the answer is:
staycation
'holiday' is the definition.
(I have seen 'local holiday' mean 'staycation' so perhaps 'holiday' could also mean 'staycation')
'on yacht without husband? it's a riotous' is the wordplay.
'without' suggests deleting specific letters.
'husband?' becomes 'h'.
'riotous' is an anagram indicator.
'on'+'yacht'='onyacht'
'onyacht' with 'h' taken away is 'onyact'.
'onyact'+'its'+'a'='onyactitsa'
'onyactitsa' with letters rearranged gives 'STAYCATION'.
(Other definitions for staycation that I've seen before include "Holiday at home" , "local holiday" .)