Jazzman regularly seen with meadow flower (6)
I believe the answer is:
azalea
'flower' is the definition.
(type of flower)
'jazzman regularly seen with meadow' is the wordplay.
'regularly seen' indicates alternate letters.
'with' says to put letters next to each other.
'meadow' becomes 'lea' (a lea is a grassy area).
The alternating letters of 'jazzman' are 'aza'.
'aza'+'lea'='AZALEA'
(Other definitions for azalea that I've seen before include "Flowering shrub related to rhododendrons" , "Rhododendron subgenus" , "Ornamental lime-hating shrub" , "Rhododendron relative" , "Colourful shrub related to rhododendron" .)