Cryptic crossword clue
Long-winded chap finally promising to follow 5

The most common and most likely answer to this crossword clue is the 5 letter word PROSY

I've seen this crossword clue in The Times
P
R
O
S
Y

Buddy explains!

The straight part
We know that "Long-winded" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case long-winded = prosy.
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 PROSY mean?

PROSY adjective
  1. Unpoetic (of speech or writing); dull and unimaginative.
  2. Behaving in a dull way (of a person); boring, tedious.

Latest crossword clues with full explanations