Drag a monarch to the place of incarceration (5)
I believe the answer is:
tower
'the place of incarceration' is the definition.
I can't tell whether this definition defines the answer.
'drag a monarch' is the wordplay.
'drag' becomes 'tow' (towing is a kind of dragging).
'a monarch' becomes 'er' (abbreviation for Elizabeth Regina, British Queen).
'tow'+'er'='TOWER'
'to' is the link.
Can you help me to learn more?
(Other definitions for tower that I've seen before include "Perhaps keep" , "Campanile, spire etc" , "Stand very high (over)" , "tractor, perhaps" , "Skyscraper" .)