Get back into Soul Train (7)
I believe the answer is:
cortege
'train' is the definition.
(both can mean a procession following behind)
'get back into soul' is the wordplay.
'back' is a reversal indicator.
'into' is an insertion indicator.
'soul' becomes 'core' (core can mean a person's soul).
'get' back-to-front is 'teg'.
'teg' placed into 'core' is 'CORTEGE'.
(Other definitions for cortege that I've seen before include "Solemn funeral procession" , "Entourage, retinue" , "Processing figures" , "train" .)