Hot seat abandoned in a hurry (5)
I believe the answer is:
haste
'in a hurry' is the definition.
(I've seen this before)
'hot seat abandoned' is the wordplay.
'hot' becomes 'h' (abbreviation eg on taps).
'abandoned' indicates anagramming the letters (the original order is abandoned).
'seat' with letters rearranged gives 'aste'.
'h'+'aste'='HASTE'
(Other definitions for haste that I've seen before include "Hurry, urgency" , "''Marry in . . . . ., repent at leisure''" , "The more of it, the less speed sometimes" , "Speediness or rush" , "The more of it, the less speed, it is said" .)