The most common and most likely answer to this crossword clue is the 6 letter word SIMPER
S
I
M
P
E
R
More clues leading to the result SIMPER
- Smile weakly as less sophisticated learner getting left out
- Smirk from MP is upsetting the Queen
- Silly smile is easier after losing weight
- Affected smile less affected without hint of leer
- Silly smile easier after losing pound
- Fawn is more natural when passing over fifty
- Son’s flabbier with top off prompting silly smile
Buddy explains!

The straight part
We know that "Silly smile" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case silly smile = simper.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 SIMPER mean?
SIMPER noun- A foolish, frivolous, self-conscious, or affected smile; a smirk.
- To smile in a foolish, frivolous, self-conscious, coy, or smug manner.
- To glimmer; to twinkle.