The most common and most likely answer to this crossword clue is the 4 letter word THAI
T
H
A
I
More clues leading to the result THAI
- Language used by violent youth ultimately on main road
- What's said to restrict someone in the Far East
- National relationship mentioned
- Asian sounds secure
- Language restriction for listener
- Heard neckwear is Asian
- Language game on the radio
- Language teacher has again impressed, primarily
- Said what you might find on collar of Siamese
- Asian couple is talked about
Buddy explains!
The straight part
We know that "Tamil month when 1ac comes" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tamil month when 1ac comes = thai.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.