Cryptic crossword clue
Like the most interfering person, giving one no rest for the most part 7

The most common and most likely answer to this crossword clue is the 7 letter word NOSIEST

I've seen this crossword clue in Financial Times
N
O
S
I
E
S
T


Buddy explains!

The straight part
We know that "Like the most interfering person" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case like the most interfering person = nosiest.
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 NOSIEST mean?

NOSIEST adjective
  1. Prying, inquisitive or curious in other’s affairs; tending to snoop or meddle.
  2. Having a large or elongated nose.

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