Remains erect until there's a dead stop (10)
I believe the answer is:
standstill
'a dead stop' is the definition.
(thesaurus)
'remains erect until' is the wordplay.
I cannot really understand how this works, but
'remains' could be 'stands' (standing is a kind of remaining) and 'stands' is found in the answer.
'until' could be 'till' (I've seen this in other clues) and 'till' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'there's' acts as a link.
Can you help me to learn more?
(Other definitions for standstill that I've seen before include "negation of motion" , "Perhaps jam" , "Situation without movement or activity" , "arrest" , "complete halt" .)