Impression created by fast runs, nothing extreme (5)
I believe the answer is:
'impression' is the definition.
(impression created by a printer)
'fast runs nothing extreme' is the wordplay.
'fast runs' becomes 'sprints'.
'nothing extreme' says to take the centre (the letters on the extremes are removed).
The centre of 'sprints' is 'PRINT'.
'created by' acts as a link.
(Other definitions for print that I've seen before include "impression" , "Publish; photograph" , "Copy of painting" , "Fabric pattern" , "Stamp" .)