Answer: CLAN LAIRD
The answer to the puzzle is encoded in this poem by stressed and unstressed syllables, which can be identified by saying the poem aloud. Each line can be converted into a letter via Morse code, where a stressed syllable is a dash and unstressed is a dot. (S = stressed, U = unstressed)
S U S U = C U S U U = L U S = A S U = N U S U U = L U S = A U U = I U S U = R S U U = DThe answer to the puzzle is CLAN LAIRD.