Cryptic crossword clue
Blue door curiously concealing crush — stress may increase it 5,8

The most common and most likely answer to this crossword clue is the 5 plus 8 letter word BLOOD PRESSURE

I've seen this crossword clue in The Guardian
B
L
O
O
D
P
R
E
S
S
U
R
E

Buddy explains!

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.

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