Servant just as big as a ruler? (7)
I believe the answer is:
footman
'servant' is the definition.
(footman is a kind of servant)
'just as big as a ruler?' is the wordplay.
I cannot quite understand how this works, but
'a' could be 'an' and 'an' is found in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for footman that I've seen before include "Liveried servant" , "Liveried flunkey" , "Archaic servant dressed in livery" .)