Call famous matchmaker on the mobile to create problem (7)
I believe the answer is:
dilemma
'problem' is the definition.
(a dilemma is a problem)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for dilemma that I've seen before include "Difficult situation - may have horns" , "Problem (with horns?)" , "difficult question" , "The choice between courses of action, all equally undesirable" , "embarrassment" .)