Doctor and poet getting writer's block? (7)
I believe the answer is:
notepad
'writer's block?' is the definition.
(block of paper)
'doctor and poet getting' is the wordplay.
'doctor' indicates an anagram.
'getting' means one lot of letters go next to another.
'and'+'poet'='andpoet'
'andpoet' with letters rearranged gives 'NOTEPAD'.
(Other definitions for notepad that I've seen before include "Tablet" , "Place for recording" , "A secretary may have one" , "Where memos get written" , "On which one writes" .)