Flower in Oxford for goddess (4)

I believe the answer is:

isis

I'm a little stuck... Click here to teach me more about this clue!

This could be a double definition.

'flower in oxford' is the first definition.
'Isis' can be an answer for 'flower' (term for the River Thames in Oxford). I am not sure about the 'in oxford' bit.

'for goddess' is the second definition.
(Egyptian god)

Can you help me to learn more?

(Other definitions for isis that I've seen before include "A dark blue flower" , "Egypt. goddess" , "Exists twice for a goddess" , "Part of river" , "Jihadists" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.