Popular measures applied as part of theme? (7)

I believe the answer is:

insteps

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

'popular measures applied as part of theme?' is the definition.
I can't judge whether this definition defines the answer.

'popular measures' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'measures' becomes 'steps' ('step' can be a synonym of 'measure').
'in'+'steps'='INSTEPS'

Can you help me to learn more?

(Another definition for insteps that I've seen is " Foot arches".)

I've seen this clue in The Irish 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.