Here are the clues and the letters that I have fitting- don't forget it's cryptic.
4 d- Jam with a squirt of lemon
7 letters **U*E*E
I think the answer is SQUEEZE
5d- It's right to help with bombing mission
4 letters **I*
Thinking it may be AIDE?
6 d- Graduate and I get oaf to empty water from canoe
4 then 3 letters **I*O*T
I think it ends in OUT (thin out?)
4 a- Bush says, "Stop talking and massage!"
5 letters first, third and fifth letter are the start of the 3 answers above
maybe shush but can't fit that into the clue meaning
And it would make it S*A**