Irish soul mate starts shrugging shoulders
I believe the answer is:
body language
'irish' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for body language that I've seen before include "Unspoken communication" , "Movements and postures that indicate feelings" , "Wordless personal communication" , "Reading material" , "suggestive poses?" .)