Slow movement of ringleader in gaolbreak (5)
I believe the answer is:
largo
'slow movement' is the definition.
(I've seen this before)
'of ringleader in gaolbreak' is the wordplay.
I cannot quite see how this works, but
'of' could be 'o' and 'o' is present in the answer.
'ringleader' could be 'r' (first letter of ring) and 'r' is found within the answer.
The remaining letters 'lag' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for largo that I've seen before include "Key -, Humphrey Bogart film" , "Slow and dignified tempo in music" , "Handel's piece?" , "To be played slowly and broadly" , "at stately speed" .)