Pay attention to, commonly — with this? (3)
I believe the answer is:
ear
'pay attention' is the definition.
'ear' can be an answer for 'attention' (having someone's ear is having their attention). I am unsure of the 'pay' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for ear that I've seen before include "Aural organ" , "Van Gogh missing body part" , "organ with drum" , "Lend one and listen" , "one hears" .)