Sufficient promotional material provided before match (8)
I believe the answer is:
adequate
'sufficient' is the definition.
(similar in meaning)
'promotional material provided before match' is the wordplay.
I cannot really understand how this works, but
'match' could be 'equate' (to equate is to match or be equivalent) and 'equate' is found in the answer.
'promotional material' could be 'ad' (ad is a kind of promotional material) and 'ad' is located in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for adequate that I've seen before include "Just about sufficient, acceptable" , "Enough to meet a purpose" , "Satisfactory, good enough" , "Good or plentiful enough" , "Barely sufficient" .)