The most common and most likely answer to this crossword clue is the 6 letter word RIPPED
R
I
P
P
E
D
Buddy explains!

The straight part
We know that "rent" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rent = ripped.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 RIPPED mean?
RIPPED verb- To divide or separate the parts of (especially something flimsy such as paper or fabric), by cutting or tearing; to tear off or out by violence.
- To tear apart; to rapidly become two parts.
- To get by, or as if by, cutting or tearing.
- To move quickly and destructively.
- To cut wood along (parallel to) the grain.
- To copy data from CD, DVD, Internet stream, etc. to a hard drive, portable device, etc.
- (narcotics) To take a "hit" of marijuana.
- To fart.
- To mock or criticize (someone or something). (often used with on)
- To steal; to rip off.
- To move or act fast, to rush headlong.
- To tear up for search or disclosure, or for alteration; to search to the bottom; to discover; to disclose; usually with up.
- To surf extremely well.
- Torn, either partly or into separate pieces.
- Pulled away from forcefully.
- In data storage, transferred to a hard disk from another portable media form.
- Copied or stolen usually from an identified source.
- Having extremely low bodyfat content so that the shape of the underlying muscles become pronounced. Said especially of well-defined abdominal muscles.
- Drunk, inebriated.