Organ stop with one cubic centimetre in sport (7)
I believe the answer is:
piccolo
'organ stop' is the definition.
(thesaurus)
'one cubic centimetre in sport' is the wordplay.
'one' becomes 'i' (Roman numeral).
'cubic centimetre' becomes 'cc' (synonyms).
'in' is an insertion indicator.
'sport' becomes 'polo' (polo is a kind of sport).
'i'+'cc'='icc'
'icc' put within 'polo' is 'PICCOLO'.
'with' is the link.
(Other definitions for piccolo that I've seen before include "producer of note" , "Instrument (meaning "little")" , "High flute" , "Musical instrument - little (Italian)" , "Small high-pitched flute" .)