Way to record pace (4)
I believe the answer is:
step
'pace' is the definition.
(synonyms)
'way to record' is the wordplay.
'way' becomes 'st'.
'to record' becomes 'ep'.
'st'+'ep'='STEP'
(Other definitions for step that I've seen before include "Manner of walking" , "Foot movement" , "Single pace" , "Pace (taken one at a time?)" , "Footprint" .)