Neat petticoat in primrose (7)
I believe the answer is:
cowslip
'primrose' is the definition.
(I know that cowslip is a type of primrose)
'neat petticoat' is the wordplay.
'neat' becomes 'cow' (neat can mean cattle).
'petticoat' becomes 'slip' (I've seen this in another clue).
'cow'+'slip'='COWSLIP'
'in' acts as a link.
(Other definitions for cowslip that I've seen before include "bloomer" , "Early spring flower" , "Wild spring flower" , "Yellow spring flower" , "Flower related to primrose" .)