Knotted, it possibly has a loose end (3)
I believe the answer is:
tie
'knotted it possibly has a loose end' is the definition.
I can't judge whether this defines the answer.
'it possibly has a loose end' is the wordplay.
'possibly' is an anagram indicator.
'has' says to put letters next to each other.
'end' suggests the final letters.
The last letter of 'loose' is 'e'.
'it' with letters rearranged gives 'ti'.
'ti'+'e'='TIE'
Can you help me to learn more?
(Other definitions for tie that I've seen before include "item round neck" , "Bind; knot" , "hamper" , "Draw - knot" , "Equal scores" .)