Nothing in promotional material he had turned up (8)
I believe the answer is:
ploughed
'turned up' is the definition.
(to plough earth is to turn it up)
'nothing in promotional material he had' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'in' is an insertion indicator.
'promotional material' becomes 'plug' (plug is a kind of promotional material).
'he had' becomes 'hed'.
'o' going inside 'plug' is 'ploug'.
'ploug'+'hed'='PLOUGHED'
(Other definitions for ploughed that I've seen before include "Churned up (of soil)" , "Worked in a particular field" , "Broke earth and turned it over" , "Prepared (a field) for planting" , "Turned over soil with bladed farm implement" .)