Bishop and I disarmed desperate female holding up a train? (10)
I believe the answer is:
bridesmaid
'female holding up a train?' is the definition.
(a bridesmaid might hold up a bride's train)
'bishop and i disarmed desperate' is the wordplay.
'bishop' becomes 'b' (chess abbreviation).
'and' means one lot of letters go next to another.
'desperate' indicates anagramming the letters (a desperate or pathetic spelling).
'i'+'disarmed'='idisarmed'
'idisarmed' anagrammed gives 'ridesmaid'.
'b'+'ridesmaid'='BRIDESMAID'
(Other definitions for bridesmaid that I've seen before include "one's holding up train perhaps" , "match participant" , "Attendant at wedding" .)