Saboteur worried by article nearby (11)
I believe the answer is:
thereabouts
'nearby' is the definition.
(thesaurus)
'saboteur worried by article' is the wordplay.
'worried' indicates an anagram.
'by' says to put letters next to each other.
'article' becomes 'the' (the 'definite article' part of speech).
'saboteur' is an anagram of 'reabouts'.
'reabouts' after 'the' is 'THEREABOUTS'.
(Other definitions for thereabouts that I've seen before include "roughly" , "Near that place" , "in that neighbourhood" .)