The most common and most likely answer to this crossword clue is the 6 letter word CHEESE
I've seen this crossword clue in The Times
C
H
E
E
S
E
More clues leading to the result CHEESE
- Dairy produce that's corny?
- I’m said to make you smile: the stuff of dreams?
- It's said to make you smile
- Mostly give comfort to southeast Lancashire?
- Contents of board that's said to make you smile
- It can raise a smile — even when blue?
- Notice about splitting revolutionary food
- Children learn about East Cheshire?
- Perhaps quark‘s revolutionary energy covering casing of electrons
- What to say to photographer in Wensleydale, perhaps?
Buddy explains!

The straight part
We know that "that's said to make you smile" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that's said to make you smile = cheese.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 CHEESE mean?
CHEESE noun- A dairy product made from curdled or cultured milk.
- Any particular variety of cheese.
- A piece of cheese, especially one moulded into a large round shape during manufacture.
- That which is melodramatic, overly emotional, or cliché, i.e. cheesy.
- Money.
- In skittles, the roughly ovoid object that is thrown to knock down the skittles.
- A fastball.
- A dangerous mixture of black tar heroin and crushed Tylenol PM tablets. The resulting powder resembles grated cheese and is snorted.
- Smegma.
- Holed pattern of circuitry to decrease pattern density.
- A mass of pomace, or ground apples, pressed together in the shape of a cheese.
- The flat, circular, mucilaginous fruit of the dwarf mallow (Malva rotundifolia) or marshmallow (Althaea officinalis).
- A low curtsey; so called on account of the cheese shape assumed by a woman's dress when she stoops after extending the skirts by a rapid gyration.
- To prepare curds for making cheese.
- To make holes in a pattern of circuitry to decrease pattern density.
- To smile excessively, as for a camera.
- Said while being photographed, to give the impression of smiling.
- Wealth, fame, excellence, importance.
- (British India) The correct thing, of excellent quality; the ticket.
- To stop; to refrain from.
- To anger or irritate someone, usually in combination with "off".
- To use an unsporting tactic; to repeatedly use an attack which is overpowered or difficult to counter.
- To use an unconventional, all-in strategy to take one's opponent by surprise early in the game (especially for real-time strategy games).