It has changed states in an old-fashioned way (5)

I believe the answer is:

saith

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

'states in an old-fashioned way' is the definition.
Although both the answer and 'states' are verbs, they are not in the same form of the verb.

'it has changed' is the wordplay.
'changed' indicates an anagram.
'it'+'has'='ithas'
'ithas' with letters rearranged gives 'SAITH'.

Can you help me to learn more?

I've seen this clue in The Globe and Mail.

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.