Some mouth organs an issue for Odin (4)
I believe the answer is:
thor
'for odin' is the definition.
(thesaurus)
'some mouth organs an' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'THOR' is hidden within 'mouth organs an'.
'issue' is the link.
(Other definitions for thor that I've seen before include "Scandinavian thunder-god" , "Norse god of war" , "Norse god for whom Thursday is named" , "The Thunderer" , "Germanic deity" .)