Diets affected by sea changes (5)

I believe the answer is:

tides

'sea changes' is the definition.

'diets affected' is the wordplay.
'affected' indicates an anagram.
'diets' anagrammed gives 'TIDES'.

'by' is the link.

(Other definitions for tides that I've seen before include "Lunar-driven sea movements (5)" , "Periodic ebbs and flows of the sea" , "Sited (anag.)" , "Lunar ocean movements" , "They ebb and flow" .)

I've seen this clue in The Mirror.

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.