One getting into remixed Bush LP issue (7)
I believe the answer is:
publish
'issue' is the definition.
(I know that issue can be written as publish)
'one getting into remixed bush lp' is the wordplay.
'one' becomes 'i' (Roman numeral).
'getting into' indicates putting letters inside.
'remixed' indicates an anagram.
'bush'+'lp'='bushlp'
'bushlp' is an anagram of 'publsh'.
'i' inserted inside 'publsh' is 'PUBLISH'.
(Other definitions for publish that I've seen before include "Issue, make known" , "Report" , "Make generally known" , "Issue (a book/magazine)" , "Get into print" .)