A flower brought back from my lilac patch (4)
I believe the answer is:
lily
'a flower' is the definition.
(I've seen this in another clue)
'brought back from my lilac patch' is the wordplay.
'brought back' is a reversal indicator.
'from' says the answer is hidden in the clue.
'ylil' is hidden within 'my lilac patch'.
'ylil' written backwards gives 'LILY'.
(Other definitions for lily that I've seen before include "Fragrant bulbous plant" , "Flowering bulb" , "Fragrant flower" , "Tiger -; water -" , "- - Allen, singer" .)