Please guests, containing smooth transition (5)
I believe the answer is:
segue
'smooth transition' is the definition.
(I've seen this in another clue)
'please guests containing' is the wordplay.
'containing' indicates the answer is hidden within the clue.
'SEGUE' is hidden in the letters of 'please guests'.
(Other definitions for segue that I've seen before include "Keep going without interruption" , "carry on" , "Change smoothly from one thing to another" , "Smooth musical transition" , "Follow on seamlessly" .)