Cylindrical (7)
I believe the answer is:
tubular
'cylindrical' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tubular that I've seen before include "Shaped like a pipe" , "Hollow and cylindrical" , "In the form of a pipe" , "- - Bells (Mike Oldfield)" , "Tube-like" .)