Irish relative linked to leading group in film? That's unconnected (10)
I believe the answer is:
irrelevant
'that's unconnected' is the definition.
(thesaurus)
'irish relative linked to leading group in film?' is the wordplay.
I cannot quite understand how this works, but
'irish' could be 'ir' (abbreviation) and 'ir' is present in the answer.
'relative' could be 'rel' (mathematical abbreviation) and 'rel' is located in the answer.
'leading group' could be 'van' (I've seen this before) and 'van' is found within the answer.
'film?' could be 'et' (E.T. the Extra-Terrestrial) and 'et' is found in the remaining letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for irrelevant that I've seen before include "neither here nor there" , "without connection" , "inappropriate?" , "Immaterial" , "Not appropriate to the matter in hand" .)