Surprises husband wearing footwear (6)
I believe the answer is:
shocks
'surprises' is the definition.
(shocking is a kind of surprising)
'husband wearing footwear' is the wordplay.
'husband' becomes 'h' (abbreviation).
'wearing' is an insertion indicator.
'footwear' becomes 'socks' (socks is a kind of footwear).
'h' placed inside 'socks' is 'SHOCKS'.
(Other definitions for shocks that I've seen before include "Effects of charges of electricity" , "'Stuns, jolts (6)'" , "Surprises, sometimes electrical" , "Appals" , "Jolts, jars" .)