Lo, a carpet laid out for a queen! (9)
I believe the answer is:
cleopatra
'queen' is the definition.
(Cleopatra is an example)
'lo a carpet laid out for a' is the wordplay.
'laid out' indicates an anagram.
'for' says to put letters next to each other.
'lo'+'carpet'='locarpet'
'locarpet' with letters rearranged gives 'cleopatr'.
'cleopatr'+'a'='CLEOPATRA'
(Other definitions for cleopatra that I've seen before include "Poet Clara is a queen" , "Beautiful queen of ancient Egypt" , "Good part for actress" , "drama queen" , "Ancient queen of 12 across" .)