More shabby (7)
I believe the answer is:
rattier
'more shabby' is the definition.
('ratty' can be a synonym of 'shabby')
This is all the clue.
(Other definitions for rattier that I've seen before include "More bad tempered (colloquial)" , "more likely to snap?" , "more irritable mood" , "more annoyed" , "Not so placid" .)