The most common and most likely answer to this crossword clue is the 6 letter word DIVIDE
I've seen this crossword clue in The Guardian
D
I
V
I
D
E
More clues leading to the result DIVIDE
- Separate identity given in sleazy bar
- … unfortunately died after accepting sex part …
- Share joint round – I would!
- Daughter’s 16 on day sweetheart split
- Split up, assuming sex is performed with energy
- Joint I’d brought in to share
- Share identification in club with a poor reputation
- Entering sleazy bar, I had to be set apart
- Daughter with four fish to share
- Funnily, to multiply, an amoeba has to do this!
Buddy explains!

The straight part
We know that "split" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case split = divide.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 DIVIDE mean?
DIVIDE noun- A thing that divides.
- An act of dividing.
- A distancing between two people or things.
- A large chasm, gorge, or ravine between two areas of land.
- The topographical boundary dividing two adjacent catchment basins, such as a ridge or a crest.
- To split or separate (something) into two or more parts.
- To share (something) by dividing it.
- (with by) To calculate the number (the quotient) by which you must multiply one given number (the divisor) to produce a second given number (the dividend).
- To be a divisor of.
- To separate into two or more parts.
- Of a cell, to reproduce by dividing.
- To disunite in opinion or interest; to make discordant or hostile; to set at variance.
- To break friendship; to fall out.
- To have a share; to partake.
- To vote, as in the British parliament and other legislatures, by the members separating themselves into two parties (as on opposite sides of the hall or in opposite lobbies), that is, the ayes dividing from the noes.
- To mark divisions on; to graduate.
- To play or sing in a florid style, or with variations.