I'm looking for an answer which is a SEA
from the following clues:---
1. 1st letter to clue Manual = Handbook (H)
2. 2nd letter to clue Pace   = S ? E ?  (?)
   the S is 1st letter from answer Sidedish=
   clue eg salad 4,4
3. 1st letter to clue Go Under = Sink   (S)
4. 7th letter to clue Express gratitude
                            = Thankyou  (O)
5. 1st letter to Toxic Gas, 7,3
               = Mustard Gas   (M)
6. 2nd letter to clue Grit = Sand  (A)
So 6 letters any order H ? S O M A = 
      a SEA  ?