Cheers when splitting a variable screen image (6)
I believe the answer is:
avatar
'image' is the definition.
(I have seen 'Online image ' mean 'avatar' so perhaps 'image' could also mean 'avatar')
'cheers when splitting a variable screen' is the wordplay.
'cheers' becomes 'ta' (both can informally mean thank you).
'when splitting' indicates putting letters inside (some letters split a word into two).
'variable screen' becomes 'var' (I am not sure about this - if you are sure you should believe this answer much more).
'a'+'var'='avar'
'ta' placed into 'avar' is 'AVATAR'.
Can you help me to learn more?
(Other definitions for avatar that I've seen before include "A person who seems to embody a particular ideal" , "Manifestation of a deity (Hinduism)" , "Incarnation of a Hindu deity in human or animal form" , "Computer icon representing the user" , "Bodily form of (Hindu) deity" .)