Manipulate engineer going to dance (5)
I believe the answer is:
rejig
'manipulate' is the definition.
(I've seen this before)
'engineer going to dance' is the wordplay.
'engineer' becomes 're' (Royal Engineer).
'going to' is a charade indicator (letters next to each other).
'dance' becomes 'jig' (jig is a kind of dance**).
're'+'jig'='REJIG'
(Other definitions for rejig that I've seen before include "Rearrange (something)" , "Re-equip; change round" , "Arrange in new way" , "Arrange another way" , "making new arrangement" .)