Most precipitous steps to be made without a goal-kicker's support (8)
I believe the answer is:
steepest
'most precipitous' is the definition.
('steep' can be a synonym of 'precipitous')
'steps to be made without a goal-kicker's support' is the wordplay.
I cannot really understand how this works, but
'support' could be 'tee' (tee is a kind of support) and 'tee' is found in the answer.
an anagram of 'steps' is 'spest' which is present in the left over letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for steepest that I've seen before include "Most expensive" , "extremely dear" , "most severe" , "Rising most sharply" , "With the sharpest incline" .)