Great catcher rising after pass (8)
I believe the answer is:
colossal
'great' is the definition.
(I know that great can be written as colossal)
'catcher rising after pass' is the wordplay.
'catcher' becomes 'lasso' (rope used to catch an animal).
'rising' shows that the letters should be reversed in order (going up in a down clue).
'after' is a charade indicator (letters next to each other).
'pass' becomes 'col' (col is a term for a mountain pass).
'lasso' in reverse letter order is 'ossal'.
'ossal' put after 'col' is 'COLOSSAL'.
(Other definitions for colossal that I've seen before include "Huge, vast" , "Jumbo" , "Massive" , "Mammoth" , "Gargantuan" .)