Scottish writer's block unending (6)
I believe the answer is:
barrie
'scottish writer's' is the definition.
'Barrie' can be an answer for 'writer's' (JM Barrie, author of Peter Pan). I am not certain of the 'scottish' bit.
'block unending' is the wordplay.
'block' becomes 'barrier' (I've seen this before).
'unending' means to remove the last letter (the word doesn't have its end letter).
'barrier' with its final letter taken away is 'BARRIE'.
Can you help me to learn more?
(Other definitions for barrie that I've seen before include "Children's writer" , "J. M. -, Peter Pan creator" , "J. M. -, Peter Pan author" , "Peter Pan's creator" , "Scottish playwright" .)