Coast reports look certain (8)
I believe the answer is:
seashore
'coast' is the definition.
(I know that coast can be written as seashore)
'reports look certain' is the wordplay.
'reports' indicates a 'sounds like' (homophone) clue (I've seen 'report' mean this).
'look' becomes 'see'.
'certain' becomes 'shore' (I can't justify this - if you can you should give a lot more credence to this answer).
'see' sounds like 'sea'.
'sea'+'shore'='SEASHORE'
Can you help me to learn more?
(Other definitions for seashore that I've seen before include "Coast, of an ocean say" , "Coastal land's edge" , "Nautical cry" , "She sells seashells on it" , "where holidaymakers gather?" .)