The most common and most likely answer to this crossword clue is the 7 letter word RUDDIER
I've seen this crossword clue in The Daily Telegraph
R
U
D
D
I
E
R
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.
What does RUDDIER mean?
RUDDIER adjective- Reddish in color, especially of the face, fire, or sky.
- A mild intensifier, expressing irritation.