Ramshackle Welsh store closing early, offering zero value (9)
I believe the answer is:
worthless
'offering zero value' is the definition.
(having no worth or value)
'ramshackle welsh store closing early' is the wordplay.
'ramshackle' indicates an anagram (I've seen this in other clues).
'closing early' means to remove the last letter.
'welsh'+'store'='welshstore'
'welshstore' with its last letter removed is 'welshstor'.
'welshstor' with letters rearranged gives 'WORTHLESS'.
(Other definitions for worthless that I've seen before include "Wretched" , "Good-for-nothing" , "Having no value" .)