Share gets artist into trouble (6)
I believe the answer is:
ration
'share' is the definition.
(I've seen this before)
'artist into trouble' is the wordplay.
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'trouble' indicates an anagram.
'into' is an anagram of 'tion'.
'ra'+'tion'='RATION'
'gets' is the link.
(Other definitions for ration that I've seen before include "Share of food, etc" , "adequate amount" , "Limit supply of (eg, food)" , "Wartime allowance?" , "Limit quantity as of food during scarcity" .)