Gathered I'm surprised and embarrassed about underwear (9)
I believe the answer is:
harvested
'gathered' is the definition.
(harvesting is a kind of gathering)
'i'm surprised and embarrassed about underwear' is the wordplay.
'i'm surprised' becomes 'ha' (I've seen this in other clues).
'and' says to put letters next to each other.
'embarrassed' becomes 'red' (someone may blush or go red when embarrassed).
'about' is an insertion indicator.
'underwear' becomes 'vest'.
'red' placed around 'vest' is 'rvested'.
'ha'+'rvested'='HARVESTED'
(Other definitions for harvested that I've seen before include "Gathered, reaped" , "He starved (anag) -- gathered food" , "Gathered in the crops" .)