Let lawmen loose with good intentions (4-5)
I believe the answer is:
well-meant
'with good intentions' is the definition.
(well-meaning or with noble intentions)
'let lawmen loose' is the wordplay.
'loose' is an anagram indicator (letters are loosened from their original positions).
'let'+'lawmen'='letlawmen'
'letlawmen' with letters rearranged gives 'WELL-MEANT'.
(Other definitions for well-meant that I've seen before include "Kind" , "Done with good intentions but poor result" .)