Exotic items expert valued (9)
I believe the answer is:
estimable
'valued' is the definition.
(thesaurus)
'exotic items expert' is the wordplay.
'exotic' indicates an anagram.
'expert' becomes 'able' (I've seen this in other clues).
'items' anagrammed gives 'estim'.
'estim'+'able'='ESTIMABLE'
(Other definitions for estimable that I've seen before include "Deserving respect" , "Highly valued" , "highly regarded" , "Worthy of great respect" , "worthy of deep respect" .)