Hitch a loop to secure light at the top of the Christmas tree (4)
I believe the answer is:
halo
'light at the top of the christmas tree' is the definition.
I can't judge whether this defines the answer.
'hitch a loop to secure' is the wordplay.
'to secure' indicates the answer is hidden within the clue (I've seen 'securing' mean this).
'HALO' is hidden within 'hitch a loop'.
Can you help me to learn more?
(Other definitions for halo that I've seen before include "Luminous sign of saintliness" , "Sign of sainthood" , "Luminous ring" , "Disc of light" , "Ring of light round head" .)