The most common and most likely answer to this crossword clue is the 5 letter word COLIC
C
O
L
I
C
More clues leading to the result COLIC
- Complaint: it’s endlessly chilly and frosty
- Officer in charge of early complaint
- Small portion of broccoli causing complaint
- Mostly hit it off, embracing love in gut reaction
- Blimp maybe one caught by wind condition
- Pain somewhere in the mountains with one getting cold
- Early pain starts to creep onward, lasting into childhood
- Some tobacco licensing is a pain
- Gut feeling commanding officer is over defeat mostly
- Stomach upset from endless cold ice
Buddy explains!

The straight part
We know that "A bad gut feeling" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a bad gut feeling = colic.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 COLIC mean?
COLIC noun- Severe pains that grip the abdomen or the disease that causes such pains (due to intestinal or bowel-related problems).
- A medicinal plant used to relieve such symptoms.
- Relating to the colon; colonic.