Remix a Spencer Davis hit from the late 70s (5,8)
I believe the answer is:
space invaders
'hit from the late 70s' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'remix a spencer davis' is the wordplay.
'remix' is an anagram indicator (I've seen 'remix of' mean this (letters are mixed in a different way)).
'a'+'spencer'+'davis'='aspencerdavis'
'aspencerdavis' anagrammed gives 'SPACE INVADERS'.
Can you help me to learn more?
(Other definitions for space invaders that I've seen before include "Early arcade game -- aliens?" , "They'll leave you little room" , "Early electronic game" , "Early computer game" .)