New remit on the heartless crawler (7)
I believe the answer is:
termite
'crawler' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'new remit on the heartless' is the wordplay.
'new' is an anagram indicator.
'on' is an insertion indicator.
'heartless' means to remove the middle letters.
'the' with its middle removed is 'te'.
'remit' with letters rearranged gives 'ermit'.
'ermit' inserted within 'te' is 'TERMITE'.
Can you help me to learn more?
(Other definitions for termite that I've seen before include "Wood-eating insect" , "It lives on wood" , "Social type" , "White ant" , "Mound-dweller" .)