Sally's current weight put on record (7)
I believe the answer is:
epigram
'sally's' is the definition.
(thesaurus)
'current weight put on record' is the wordplay.
'current' becomes 'I' (symbol for electric current).
'weight' becomes 'gram' (unit of weight).
'put on' says to put letters next to each other (some letters go on or after others).
'record' becomes 'EP' (abbreviation for extended play record).
'i'+'gram'='igram'
'igram' put after 'ep' is 'EPIGRAM'.
(Other definitions for epigram that I've seen before include "Short witty remark" , "Snappy piece of wit" , "A clever witty saying" , "Gnome" , "it might be natural to wag" .)