Order leader of yeomen to follow command (4)
I believe the answer is:
obey
'follow command' is the definition.
(obey instructions or commands)
'order leader of yeomen' is the wordplay.
'order' becomes 'OBE' (Order of the British Empire award).
'leader of' indicates taking the first letters.
The first letter of 'yeomen' is 'y'.
'obe'+'y'='OBEY'
'to' acts as a link.
(Other definitions for obey that I've seen before include "Carry out (orders)" , "Perversely inclined to do the opposite" , "Be dominated" , "Comply with (instructions)" , "Submit to authority" .)