Showy garden flower (7)
(Other definitions for verbena that I've seen before include "Ornamental plant with showy flowers" , "Vervain (plant)" , "Ornamental pant" , "Herbaceous plant" , "Garden plant" .)
(Other definitions for peony that I've seen before include "Garden flower" , "Plant with large red, white or pink flowers" , "Bloom" , "Herbaceous flower" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">showy garden flower</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dahlia that I've seen before include "Plant with tuberous roots and showy coloured flower heads" , "Brightly coloured garden flower with tuberous roots" , "Showy flower from Mexico" , "Peculiar Ali had this flower" , "Showy, big-headed autumn flower" .)