Four-legged president? (5)
I believe the answer is:
chair
'president?' is the definition.
(synonyms)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for chair that I've seen before include "Something with legs" , "Presiding officer" , "Official position of authority" , "Preside over - seat" , "Supporter" .)