Inscription I used between record and chart (8)
I believe the answer is:
epigraph
'inscription' is the definition.
(epigraph is a kind of inscription)
'i used between record and chart' is the wordplay.
'used between' is an insertion indicator.
'record' becomes 'ep'.
'and' says to put letters next to each other.
'chart' becomes 'graph' (I've seen this before).
'ep'+'graph'='epgraph'
'i' going into 'epgraph' is 'EPIGRAPH'.
(Other definitions for epigraph that I've seen before include "Inscription on statue, coin, etc" , "Inscription on a building, statue or coin" , "Quote at start of book" , "Inscription, citation" , "Inscription (on building, coin, etc.)" .)