Four-legged source of a bleat? (5)

I believe the answer is:
table
'four-legged source' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'of a bleat?' is the wordplay.
'of' is an anagram indicator (the answer comes from or 'of' the letters).
'bleat' with letters rearranged gives 'TABLE'.
Can you help me to learn more?
(Other definitions for table that I've seen before include "Set of figures in columns" , "League --; multiplication --" , "counter" , "put on the agenda" , "Move; furniture" .)
