Stature of Henry VIII (6)
I believe the answer is:
height
'stature' is the definition.
(I've seen this before)
'henry viii' is the wordplay.
'henry' becomes 'h' ('H' can be a synonym of 'henry').
'viii' becomes 'eight' ('eight' can be a synonym of 'viii').
'h'+'eight'='HEIGHT'
'of' acts as a link.
(Other definitions for height that I've seen before include "Peak" , "Dimension upwards" , "Distance above ground or sea" , "Crowning moment" , "Vertical extent" .)