The most common and most likely answer to this crossword clue is the 6 letter word KINDER
I've seen this crossword clue in The Guardian
K
I
N
D
E
R
More clues leading to the result KINDER
Buddy explains!

The straight part
We know that "Foreign children/less savage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case foreign children/less savage = kinder.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 KINDER mean?
KINDER adjective- Having a benevolent, courteous, friendly, generous, gentle, liberal, sympathetic, or warm-hearted nature or disposition, marked by consideration for – and service to – others.
- Affectionate.
- Favorable.
- Mild, gentle, forgiving
- Gentle; tractable; easily governed.
- Characteristic of the species; belonging to one's nature; natural; native.
- Kind of; somewhat
- Children.