The lot of them rue false charm (6)
I believe the answer is:
allure
'charm' is the definition.
(I've seen this before)
'the lot of them rue false' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'rue' is 'ure' which is present in the answer.
'the lot' could be 'all' (I've seen this before) and 'all' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for allure that I've seen before include "The power to entice or attract" , "Seduction" , "Laurel (anag)" , "Tempt" , "Enchanting attractiveness" .)