Flower kid picked up? (4)
I believe the answer is:
tees
'flower' is the definition.
(River Tees)
'kid picked up?' is the wordplay.
'kid' becomes 'tease' (both can mean to mock).
'picked up?' shows a homophone (sound like) (I've seen 'picked up' mean this).
'tease' sounds like 'TEES'.
(Other definitions for tees that I've seen before include "Stockton's river" , "River of north-east England" , "Golfer's equipment" , "Sport items" , "Starting places on the golf course" .)