The answers to the following clues will have something in common.

1. Some men do it on one knee.
2. You do chores, it chews doors.
3. Grade C in school, traditionally
4. Represent a character in a play or movie
5. Diligent and sincere in one's efforts
6. Lots of money and luck
7. Male flight attendant

Answers  to clues:

1. PROPOSE
2. TERMITE
3. AVERAGE
4. PORTRAY
5. EARNEST
6. FORTUNE
7. STEWARD

What they have in common:

Each word can be split into two words with an over-lapping letter between them:

1. PRO(P)OSE
2. TER(M)ITE
3. AVE(R)AGE
4. POR(T)RAY
5. EAR(N)EST
6. FOR(T)UNE
7. STE(W)ARD

Credit: Will Shortz
NPR Weekend Edition Sunday Puzzle
LINKING LETTERS -  Feb. 8, 2009