Footballers book most of lush material (6)
I believe the answer is:
fabric
'material' is the definition.
('fabric' can be a synonym of 'material')
'footballers book most of lush' is the wordplay.
'footballers' becomes 'fa' (Football Association abbreviation).
'book' becomes 'b'.
'most of' means to remove the last letter.
'lush' becomes 'rich' ('rich' can be similar in meaning to 'lush').
'rich' with its last letter removed is 'ric'.
'fa'+'b'+'ric'='FABRIC'
(Other definitions for fabric that I've seen before include "Material in general" , "Material; structure" , "handiwork?" , "Woven textile" , "Silk or satin, say" .)