Report spouse being silly and unreasonable (12)
I believe the answer is:
preposterous
'unreasonable' is the definition.
(thesaurus)
'report spouse being silly' is the wordplay.
'being silly' is an anagram indicator.
'report'+'spouse'='reportspouse'
'reportspouse' anagrammed gives 'PREPOSTEROUS'.
'and' is the link.
(Other definitions for preposterous that I've seen before include "Ludicrous" , "Utterly absurd" , "Laughable" , "Unreasonable - fatuous" , "Crazy" .)