Height enhancers (6)
I believe the answer is:
stilts
'height enhancers' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stilts that I've seen before include "Tall sticks for lofty walking" , "Sticks to wall on" , "Poles used for walking high above the ground" , "Long sticks for elevated walking" , "Walking poles; birds" .)