The most common and most likely answer to this crossword clue is the 5 letter word CAPES
C
A
P
E
S
Buddy explains!
The straight part
We know that "places jutting in to the sea" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case places jutting in to the sea = capes.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 CAPES mean?
CAPES noun- A piece or point of land, extending beyond the adjacent coast into a sea or lake; a promontory; a headland.
- A sleeveless garment or part of a garment, hanging from the neck over the back, arms, and shoulders.
- A superhero.