Books Lineker, say, without support (6)
I believe the answer is:
gantry
'support' is the definition.
(type of structural support)
'books lineker say without' is the wordplay.
'books' becomes 'NT' (New Testament).
'lineker say' becomes 'Gary' (former footballer and broadcaster Gary Lineker).
'without' means one lot of letters goes inside another.
'nt' placed inside 'gary' is 'GANTRY'.
(Other definitions for gantry that I've seen before include "Bridge-like framework for supporting cranes" , "platform" , "Overhead structure supporting equipment" , "Overhead structure for such as crane" , "Light bridge-like framework for supporting crane" .)