Clijsters followed up her success in last week's Paris Open to claim her 21st WTA singles title.
"It is great to play on home soil with 15,000 fans rooting for you I must say," said Clijsters, who was beaten by Venus Williams in last year's final and lost to Iroda Tulyaganova in the only other final she has contested in Belgium in 2001.
"Playing Silvia is never easy. I knew from the start that she does not give away many points and I had to think a lot before attacking aggressively.
"The fact that
Clijsters broke Farina Elia's second service game but her opponent broke back immediately and it wasn't until the eighth game that the Belgian broke again to lead 5-3, from which she served out to take the set.
Hitting heavy topspin and long ground strokes Clijsters then romped through the second set as Farina Elia's resistance evaporated.
"Kim is strong all year round and I found she played her best tennis all week long in Antwerp," said the number eight seed.
"I fought very hard in the first set but then my energy left me."