The most common and most likely answer to this crossword clue is the 6 letter word FRIGID
I've seen this crossword clue in The Daily Telegraph
F
R
I
G
I
D
More clues leading to the result FRIGID
- Unaffectionate father I like to send up
- Beginning to feel stiff and cold
- Cold day: like to get up?
- Frozen stiff after first of frosts
- Run into tree? Everyman would, becoming unresponsive
- Unresponsive fellow with hard on
- Cold day, like, looking back
- Unyielding in support of Olaf at the end of Frozen
- Cold, and beginning to feel stiff
- Cold, strong and hard
Buddy explains!

The straight part
We know that "Cold" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cold = frigid.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 FRIGID mean?
FRIGID adjective- Very cold; lacking warmth; icy.
- Chilly in manner; lacking affection or zeal; impassive.
- Sexually unresponsive, especially of a woman.