Statistic you're talking about relates to height (7)
I believe the answer is:
stature
'height' is the definition.
(synonyms)
'statistic you're talking about relates' is the wordplay.
I cannot really understand how this works, but
'about' could be 're' (regarding) and 're' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for stature that I've seen before include "Height - level of esteem" , "Person's natural height" , "Height - prestige" , "Consequence" , "Importance, reputation" .)