Suit bishop wore finally at a south coast resort (6)
I believe the answer is:
behove
'suit' is the definition.
The definition and answer can be both to do with fundamental existence as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'bishop wore finally at a south coast resort' is the wordplay.
'bishop' becomes 'B' (abbreviation for bishop in chess).
'finally' suggests the final letters.
'at' means one lot of letters go next to another.
'a south coast resort' becomes 'hove' (I can't justify this - if you can you should believe this answer much more).
The final letter of 'wore' is 'e'.
'b'+'e'+'hove'='BEHOVE'
Can you help me to learn more?