A cursory hug on entering, not from love (6)
I believe the answer is:
nought
'love' is the definition.
(I've seen this before)
'a cursory hug on entering not' is the wordplay.
I cannot really understand how this works, but
an anagram of 'hug' is 'ugh' which is located in the answer.
'on' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
'not' could be 'nt' (synonyms) and 'nt' is present in the remaining letters.
No letters remain.
This explanation may well be incorrect...
'from' is the link.
Can you help me to learn more?
(Other definitions for nought that I've seen before include "Go hunt for nothing" , "Love" , "Zilch" , "The figure 0" , "The digit 0" .)