Prickle (5)
'prickle' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for thorn that I've seen before include "Old Norse character" , "Prickly plant" , "Spine - prickle - Old English runic letter" , "Woody prickle" , "irritation when in one's side" .)
'prickle' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for itch that I've seen before include "Irritating pain" , "Prickling" , "longing for something" , "Teasing desire" , "A strong restless desire" .)