Recoil, worried about politician and composer (8)
I believe the answer is:
compiler
'composer' is the definition.
(thesaurus)
'recoil worried about politician' is the wordplay.
'worried' is an anagram indicator (worry can mean to interfere with or disturb).
'about' means one lot of letters goes inside another.
'politician' becomes 'MP' (Member of Parliament).
'recoil' with letters rearranged gives 'coiler'.
'coiler' enclosing 'mp' is 'COMPILER'.
'and' is the link.
(Other definitions for compiler that I've seen before include "computing routine" , "Author of puzzles, perhaps" , "Person who puts together information" , "One assembling material from various sources" , "Writer of document" .)