Figure manure should be spread and left (7)
I believe the answer is:
numeral
'figure' is the definition.
(thesaurus)
'manure should be spread and left' is the wordplay.
'should be spread' indicates anagramming the letters (letters must be spread around).
'and' is a charade indicator (letters next to each other).
'left' becomes 'l' (common abbreviation).
'manure' anagrammed gives 'numera'.
'numera'+'l'='NUMERAL'
(Other definitions for numeral that I've seen before include "Symbol for number" , "1, 2, 3, for instance" , "Eg, 5, nine or 6301" , "Eg, two or seven" , "Such as 5, 9, iii, etc" .)