Dafter

9 clues
More mad
More nuts
Less sane
More bats?
More bananas
More meshuga
More cracked
More senseless
Not as sensible
Similar answers:
Aaabattery
Aabatteries
Aabattery
Aaroncarter
Abater
Abaters
Abatter
Abatteries
Abattery
Aberdeenterrier
Abetter
Abettermusetrap
Abetters
Abettertomorrow
Abitter
Aborter
Aborters
Aboutaquarterto
Abovewater
Abrupter