Part of a Halloween tradition where a sucker is made to welcome a little rascal (5)
I believe the answer is:
treat
'part of a halloween tradition where a sucker' is the definition.
I can't judge whether this defines the answer.
'made to welcome a little rascal' is the wordplay.
'made' becomes 'teat' (I am not sure about this - if you are sure you should believe this answer much more).
'to welcome' indicates putting letters inside (inserted letters are welcomed in).
'a little' says to take the initial letters.
The initial letter of 'rascal' is 'r'.
'teat' going around 'r' is 'TREAT'.
'is' is the link.
Can you help me to learn more?
(Other definitions for treat that I've seen before include "Engage in negotiations" , "Give medical care or free meal to" , "Care for medically" , "Shout" , "Celebration" .)