Poet messed around with and getting writer’s block? (7)
I believe the answer is:
notepad
'writer's block?' is the definition.
(I've seen this before)
'poet messed around with and' is the wordplay.
'messed around with' indicates an anagram.
'poet' mixed up with 'and' can make 'NOTEPAD'.
'getting' acts as a link.
(Other definitions for notepad that I've seen before include "Block writer might have" , "Small block of writing paper" , "Where memos get written" , "scribbler" , "Memo-block" .)