The most common and most likely answer to this crossword clue is the 6 letter word HOUSED
H
O
U
S
E
D
Buddy explains!

The straight part
We know that "Put up" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case put up = housed.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 HOUSED mean?
HOUSED verb- To keep within a structure or container.
- To admit to residence; to harbor/harbour.
- To take shelter or lodging; to abide; to lodge.
- To dwell within one of the twelve astrological houses.
- To contain or cover mechanical parts.
- To drive to a shelter.
- To deposit and cover, as in the grave.
- To stow in a safe place; to take down and make safe.
- To eat.