Row a bit, having stifled hesitation (7)
I believe the answer is:
terrace
'row' is the definition.
(row of houses)
'a bit having stifled hesitation' is the wordplay.
'a bit' becomes 'trace' (both mean a small amount).
'having' indicates putting letters inside.
'stifled hesitation' becomes 'er' (sound made while hesitating - um, er. I am not sure about the 'stifled' bit.).
'trace' placed around 'er' is 'TERRACE'.
Can you help me to learn more?
(Other definitions for terrace that I've seen before include "Stadium standing area" , "Urban housing" , "street" , "Balcony" , "Abutting row of houses" .)