Cryptic crossword clue
Support one in home that’s extremely small

The most common and most likely answer to this crossword clue is the 8 letter word TEENIEST

I've seen this crossword clue in The Guardian
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Buddy explains!

The straight part
We know that "extremely small" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case extremely small = teeniest.
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 TEENIEST mean?

TEENIEST adjective
  1. Very small; tiny.

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