As Seat is seen with scratch, no end of flak (7)
I believe the answer is:
arsenic
'as' is the definition.
(As is the chemical symbol for arsenic)
'seat is seen with scratch no end of flak' is the wordplay.
'seat' becomes 'arse' (synonyms).
'is seen with' is a charade indicator (letters next to each other).
'scratch' becomes 'nil' (I've seen this in another clue).
'no end' means to remove the last letter.
'of flak' becomes 'c' (I can't justify this - if you can you should give a lot more credence to this answer).
'nil' with its final letter taken away is 'ni'.
'arse'+'ni'+'c'='ARSENIC'
Can you help me to learn more?
(Other definitions for arsenic that I've seen before include "Brittle grey-green semi-metal, atomic number 33" , "Element No 33" , "Toxic metalloid element" , "Famous stage comedy ''. . . . . . . and Old Lace''" , "Poison used in pesticides and weedkillers" .)
