Arouse new enthusiasm about reader (8)
I believe the answer is:
rekindle
'arouse new enthusiasm' is the definition.
(kindle someone's enthusiasm again)
'about reader' is the wordplay.
'about' becomes 're' (common abbreviation for 'with reference to').
'reader' becomes 'kindle' (the Kindle is an electronic reader).
're'+'kindle'='REKINDLE'
(Other definitions for rekindle that I've seen before include "Get the fire going again" , "Cause to burn again" , "Cause to start burning again" , "Revive (something lost)" , "Light (a fire) again" .)