The most common and most likely answer to this crossword clue is the 5 letter word PORCH
P
O
R
C
H
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The straight part
We know that "Part of house" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case part of house = porch.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 PORCH mean?
PORCH noun- A covered and enclosed entrance to a building, whether taken from the interior, and forming a sort of vestibule within the main wall, or projecting without and with a separate roof.
- A portico; a covered walk.
- The platform outside the external hatch of a spacecraft.