Magnificent thousand (5)
I believe the answer is:
grand
This clue is a double definition.
'magnificent' is the first definition.
(I've seen this before)
'thousand' is the second definition.
(synonyms)
(Other definitions for grand that I've seen before include "A slangy PS1,000" , "great distinction" , "Piano; thousand pounds" , "sum of money" , "1000, colloquially" .)