Staff repel son fraudulently claiming compensation, finally (9)
I believe the answer is:
personnel
'staff' is the definition.
(thesaurus)
'repel son fraudulently claiming compensation finally' is the wordplay.
'fraudulently' is an anagram indicator (I've seen this in other clues).
'claiming' indicates putting letters inside.
'finally' indicates one should take the final letters.
The last letter of 'compensation' is 'n'.
'repel'+'son'='repelson'
'repelson' is an anagram of 'personel'.
'personel' enclosing 'n' is 'PERSONNEL'.
(Other definitions for personnel that I've seen before include "Members of staff" , "Office" , "Staff complement of an organisation" , "Manpower" , "Employees collectively" .)