Organised layout is ambitious (9)
I believe the answer is:
grandiose
'ambitious' is the definition.
(I've seen this before)
'organised layout' is the wordplay.
'layout' is an anagram indicator (an alternative layout of the letters).
'organised' is an anagram of 'GRANDIOSE'.
'is' acts as a link.
(Other definitions for grandiose that I've seen before include "Planned on a magnificent scale" , "Ridiculously impressive or imposing" , "Ambitious" , "Imposing and pompous, dressed in organdies" , "Impressive, magnificent" .)