... if the change brings a robber (5)
I believe the answer is:
thief
'a robber' is the definition.
(both can mean someone who steals)
'if the change' is the wordplay.
'change' is an anagram indicator.
'if'+'the'='ifthe'
'ifthe' with letters rearranged gives 'THIEF'.
'brings' is the link.
(Other definitions for thief that I've seen before include "Person who steals things" , "One with taking ways" , "'Taffy was a - - '" , "Burglar, say" , "Aus. or Scots city" .)