Chinese food — something boring, not much good? (7)
I believe the answer is:
trepang
'chinese food' is the definition.
(Chinese term for sea cucumber)
'something boring not much good?' is the wordplay.
'something boring' becomes 'trepan' (tool for boring holes).
'not much' says to take the initial letters (the smallest amount of the word possible).
The initial letter of 'good' is 'g'.
'trepan'+'g'='TREPANG'
(Other definitions for trepang that I've seen before include "Sea cucumber" , "Chinese food" , "Chinese delicacy" .)