Stick, ultimately one used in running slope (3,4)

'stick ultimately one used in running slope' is the definition.
'ski pole' can be an answer for 'stick' (type of stick used when skiing). I am not sure about the 'ultimately one used in running slope' bit.

'stick ultimately one used in running slope' is the wordplay.
'ultimately' indicates one should take the final letters.
'one' becomes 'I' (Roman numeral).
'used in' is an insertion indicator.
'running' is an anagram indicator.
The last letter of 'stick' is 'k'.
'k'+'i'='ki'
'slope' anagrammed gives 'spole'.
'ki' inserted inside 'spole' is 'SKI POLE'.