Around love, Tinder is designed to confuse (9)
I believe the answer is:
disorient
'confuse' is the definition.
(disorienting is a kind of confusing)
'around love tinder is designed' is the wordplay.
'around' is an insertion indicator.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'designed' indicates an anagram (designed with the letters).
'tinder'+'is'='tinderis'
'tinderis' anagrammed gives 'disrient'.
'o' inserted inside 'disrient' is 'DISORIENT'.
'to' acts as a link.
(Other definitions for disorient that I've seen before include "Puzzle" , "Get confused" , "confuse" , "muddle" .)