The most common and most likely answer to this crossword clue is the 10 letter word FOUNDATION
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result FOUNDATION
- Discovered Everyman wearing large amount of make-up
- Start at one, working to produce primer
- Establishment offering cosmetic aid?
- Discovered one in a hundred will offer charity, say
- Base discovered at holy Scottish site, blocked off at end
- Beginning of a big build-up?
- Cast adult into new 7
- Slap bottom?
- Came across people with no leader finding support
Buddy explains!

The straight part
We know that "charity, say" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case charity, say = foundation.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 FOUNDATION mean?
FOUNDATION noun- The act of founding, fixing, establishing, or beginning to erect.
- That upon which anything is founded; that on which anything stands, and by which it is supported; the lowest and supporting layer of a superstructure; underbuilding.
- The result of the work to begin something; that which stabilizes and allows an enterprise or system to develop.
- In solitaire or patience games, one of the piles of cards that the player attempts to build, usually holding all cards of a suit in ascending order.
- The lowest and supporting part or member of a wall, including the base course and footing courses; in a frame house, the whole substructure of masonry.
- A donation or legacy appropriated to support a charitable institution, and constituting a permanent fund; endowment.
- That which is founded, or established by endowment; an endowed institution or charity.
- Cosmetic cream roughly skin-colored, designed to make the face appear uniform in color and texture.
- A basis for social bodies or intellectual disciplines.