The most common and most likely answer to this crossword clue is the 4 letter word LEVA
L
E
V
A
More clues leading to the result LEVA
Buddy explains!
The straight part
We know that "Bulgarian accepts what traveller holds back" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bulgarian accepts what traveller holds back = leva.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 LEVA mean?
LEVA noun- The currency of Bulgaria, divided into 100 stotinki