Suddenly run right in front of woman (5)
I believe the answer is:
burst
'suddenly run' is the definition.
(burst can mean to run or rupture)
'right in front of woman' is the wordplay.
'right' becomes 'r' (common abbreviation).
'in' is an insertion indicator.
'front of woman' becomes 'bust' (woman's chest).
'r' going within 'bust' is 'BURST'.
(Other definitions for burst that I've seen before include "Crack" , "Smashed" , "Rupture" , "Split asunder" , "Rope to catch cattle" .)