Sources of tremendous influence within America list novel as obsessively consumerist (13)
I believe the answer is:
materialistic
'obsessively consumerist' is the definition.
I can't tell whether this definition defines the answer.
'sources of tremendous influence within america list novel' is the wordplay.
'sources of' says to take the initial letters.
'within' indicates putting letters inside.
'novel' indicates anagramming the letters.
The initial letters of 'tremendous influence' is 'ti'.
'america'+'list'='americalist'
'americalist' with letters rearranged gives 'materialisc'.
'ti' going within 'materialisc' is 'MATERIALISTIC'.
'as' acts as a link.
Can you help me to learn more?
(Other definitions for materialistic that I've seen before include "Coveting possessions" , "Valuing possessions and physical comfort" , "Keen on possessions" .)