Rhode Island sporting type involving more peril (7)
I believe the answer is:
riskier
'involving more peril' is the definition.
'rhode island sporting type' is the wordplay.
'rhode island' becomes 'ri' (US postal abbreviation).
'sporting type' becomes 'skier'.
'ri'+'skier'='RISKIER'
(Other definitions for riskier that I've seen before include "More likely to cause loss" , "less safe" , "More chancy" .)