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' is an anagram indicator.
'getting' means one lot of letters go next to another.
'and'+'poet'='andpoet'
'andpoet' is an anagram of '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" .)