In Yemeni capital ran across man of note (7)
I believe the answer is:
smetana
'man of note' is the definition.
The definition suggests a singular noun which matches the answer.
'in yemeni capital ran across' is the wordplay.
'in' is an insertion indicator.
'yemeni capital' becomes 'san'a' (I've seen this in another clue).
'ran across' becomes 'met' ('meet' can be a synonym of 'run across').
'sana' placed around 'met' is 'SMETANA'.
Can you help me to learn more?
(Other definitions for smetana that I've seen before include "Nineteenth century Czech composer (The Bartered Bride)" , "maker of notes" , "musician" , "Czech composer, d. 1884 - Eastman (anag)" , "Composer of The Bartered Bride; eats man (anag.)" .)