One, and another in the way, getting flattened (6)
I believe the answer is:
ironed
'flattened' is the definition.
(I've seen this before)
'one and another in the way' is the wordplay.
'one' becomes 'i' (Roman numeral).
'and' says to put letters next to each other.
'another' becomes 'one' (I can't justify this - if you can you should give a lot more credence to this answer).
'in the' indicates putting letters inside.
'way' becomes 'rd'.
'one' inserted into 'rd' is 'roned'.
'i'+'roned'='IRONED'
'getting' is the link.
Can you help me to learn more?
(Other definitions for ironed that I've seen before include "Removed creases" , "Given a press" , "De Niro (anag)" , "Smoothed the cloth with heat" , "Decreased?" .)