Spin around and arouse cad after taking stimulants (4,2,4,4)
I believe the answer is:
turn on ones heel
'spin around' is the definition.
(to turn on one's heel is to turn around)
'arouse cad after taking stimulants' is the wordplay.
'arouse' becomes 'turnon' (synonyms).
'cad' becomes 'heel' (synonyms).
'after taking' means one lot of letters goes inside another.
'stimulants' becomes 'ones' ('one' can informally mean an alcoholic drink).
'turnon'+'heel'='turnonheel'
'turnonheel' enclosing 'ones' is 'TURN ON ONES HEEL'.
'and' acts as a link.
(Other definitions for turn on ones heel that I've seen before include "Make a quick rotation and go back" , "head back suddenly" .)