Claimed to be proceeding by tens (7)

I believe the answer is:

decimal

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

'proceeding by tens' is the definition.
I can't judge whether this defines the answer.

'claimed to be' is the wordplay.
'to be' is an anagram indicator.
'claimed' is an anagram of 'DECIMAL'.

Can you help me to learn more?

(Other definitions for decimal that I've seen before include "of Number Ten" , "Medical (anag.)" , "Based on the number 10" , "System based on 10" , "(System) based on tens" .)

I've seen this clue in The Irish News.

Want a hint initially instead of a full solution? Install my app