For certain lines, credit makes things simpler (7)

I believe the answer is:

creases

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

'for certain lines' is the definition.
I can't judge whether this definition defines the answer.

'credit makes things simpler' is the wordplay.
'credit' becomes 'cr' (abbreviation).
'makes things simpler' becomes 'eases'.
'cr'+'eases'='CREASES'

Can you help me to learn more?

(Other definitions for creases that I've seen before include "Pressed lines or crinkles" , "Cricket lines" .)

I've seen this clue in the Evening Standard.

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.