The most common and most likely answer to this crossword clue is the 6 letter word SALLOW
I've seen this crossword clue in The Daily Telegraph
S
A
L
L
O
W
More clues leading to the result SALLOW
- Pale pig devouring everything
- Quite filling spread with pasty
- Unhealthy looking bird, having lost a wife
- Not deep, not hot, not dark
- Pasty: every bit eaten by pig
- Pale-looking having left first wife, gulp!
- She is depressed, jaundiced
- Pale, sickly and sluggish, full of talk essentially
- Pale, but superficial cut by hospital
- Anaemic little girl’s blue
Buddy explains!

The straight part
We know that "Pale" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pale = sallow.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 SALLOW mean?
SALLOW verb- To become sallow.
- To cause (someone or something) to become sallow.
- (of skin) Yellowish.
- (of a person) Having skin (especially on the face) of a sickly pale colour.
- (of objects or dim light) Having a similar pale, yellowish colour.
- Dirty; murky.
- A European willow, Salix caprea, that has broad leaves, large catkins and tough wood.
- A willow twig or branch.