Fish that should be on sea bed? (6)
I believe the answer is:
kipper
'fish that' is the definition.
'kipper' can be an answer for 'fish' (type of fish). I am unsure of the remainder of the definition.
'on sea bed?' is the wordplay.
'on' says to put letters next to each other.
'sea' becomes 'per' (I can't justify this - if you can you should give a lot more credence to this answer).
'bed?' becomes 'kip' (I've seen this in another clue).
'per' after 'kip' is 'KIPPER'.
'should be' is the link.
Can you help me to learn more?
(Other definitions for kipper that I've seen before include "part of breakfast?" , "One smoked" , "being in bed?" , "One not awake" , "Cured or smoked herring" .)