Demanding individual run out by you and I (7)
I believe the answer is:
onerous
'demanding' is the definition.
(onerous means difficult or demanding)
'individual run out by you and i' is the wordplay.
'individual' becomes 'one' (an individual is one person).
'run out' becomes 'RO' (cricket abbreviation).
'by' says to put letters next to each other.
'you and i' becomes 'us' (the two of us).
'one'+'ro'+'us'='ONEROUS'
(Other definitions for onerous that I've seen before include "Burdensome, demanding" , "Involving much effort" , "Burdensome, taxing" , "No euros? That's burdensome" , "Effortful" .)