Moore's ultimate in standing figures (7)
I believe the answer is:
statues
'figures' is the definition.
(statue is a kind of figure)
'moore's ultimate in standing' is the wordplay.
'ultimate' says to take the final letters.
'in' is an insertion indicator.
'standing' becomes 'status' (I've seen this before).
The last letter of 'moore' is 'e'.
'e' inserted into 'status' is 'STATUES'.
(Other definitions for statues that I've seen before include "Carved figures" , "Sculptured representations" , "Legislative acts" , "Commemorations of political leaders, say" .)