Organise Persia trip? No sweat (12)
I believe the answer is:
perspiration
'sweat' is the definition.
(I know that sweat can be written as perspiration)
'organise persia trip? no' is the wordplay.
'organise' is an anagram indicator.
'persia'+'trip'+'no'='persiatripno'
'persiatripno' with letters rearranged gives 'PERSPIRATION'.
(Other definitions for perspiration that I've seen before include "is exuded" , "Ninety nine percent of genius" , "Sweat" .)