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18a "Old Greek king's crew about to cross lake" (7)

T?L?M?N Thought TIMON might be the old Greek king but doesn't seem to fit

4d "Black goddess in rage" (4)

B?T? not good on Greek goddesses and can't see a word that fits here for rage

Any help much appreciated

4d Bate

https://en.oxforddictionaries.com/definition/bate

Ate= Greek goddess

18a: Telamon = old greek king (def)
team - crew
on = about
I - lake

Thank you elle and and mattrom

Glad to help, Scribbler!