The most common and most likely answer to this crossword clue is the 4 letter word BOTH
B
O
T
H
Buddy explains!
The straight part
We know that "a choice for the indecisive" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a choice for the indecisive = both.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.
What does BOTH mean?
BOTH pronoun- Each of the two, or of the two kinds.
- Including both of (used with and).
- Including all of (used with and).