Articles about Bart’s last letter to Homer (5)
I believe the answer is:
theta
'letter to homer' is the definition.
I can't tell whether this definition defines the answer.
'articles about bart's last' is the wordplay.
'articles' becomes 'the a' (definite article 'the', indefinite article 'a').
'about' is an insertion indicator.
'last' says to take the final letters.
The final letter of 'bart' is 't'.
'thea' going around 't' is 'THETA'.
Can you help me to learn more?
(Other definitions for theta that I've seen before include "Eighth letter of Greek alphabet" , "Make amends for" , "Foreign character" , "letter from abroad" , "letter from Argos?" .)