Osier: dry, withered and pathetic (8)
I believe the answer is:
'pathetic' is the definition.
(I've seen this before)
'osier dry withered' is the wordplay.
'withered' indicates anagramming the letters.
'osierdry' is an anagram of 'DERISORY'.
'and' is the link.
(Other definitions for derisory that I've seen before include "Showing scorn or ridicule" , "pathetically small" , "ridiculously little" , "Insultingly small" , "Deserving of scorn, not to be taken seriously" .)