Exotic nuts laid on thus (10)
I believe the answer is:
outlandish
'exotic' is the definition.
(thesaurus)
'nuts laid on thus' is the wordplay.
'nuts' indicates an anagram (nuts can mean crazy).
'laid'+'on'+'thus'='laidonthus'
'laidonthus' is an anagram of 'OUTLANDISH'.
(Other definitions for outlandish that I've seen before include "Lad shoutin' (anag)" , "Exotic" , "Bizarre - hound's tail (anag)" .)