The most common and most likely answer to this crossword clue is the 10 letter word APOPLECTIC
I've seen this crossword clue in The Guardian
A
P
O
P
L
E
C
T
I
C
More clues leading to the result APOPLECTIC
- Poetical PCon the rampage
- Incensed at people rejecting seconds, start to convulse and twitch
- Infuriated, when pact with police is broken
- Each lecturer scratching head, frantic, seething
- Infuriated when pact with police is broken
- With red vision, optical rimless specs will need to be adjusted
- 8 captain briefly could get mad
- Red with rage, a father's quirkily varied market outside
- Furious pace with pilot flying with the speed of light
Buddy explains!

The straight part
We know that "Infuriated" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case infuriated = apoplectic.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 APOPLECTIC mean?
APOPLECTIC noun- A person suffering from apoplexy.
- Of, or relating to apoplexy.
- Marked by extreme anger or fury.
- Effused with blood.