Poetic tat scribbled on slip (9)
I believe the answer is:
petticoat
'slip' is the definition.
(thesaurus)
'poetic tat scribbled' is the wordplay.
'scribbled' is an anagram indicator (I've seen this in other clues).
'poetic'+'tat'='poetictat'
'poetictat' anagrammed gives 'PETTICOAT'.
'on' acts as a link.
(Other definitions for petticoat that I've seen before include "Woman's undergarment" , "London Lane" , "Slip" , "Female undergarment" , "garment" .)