Clichy is talented, that's for sure, and if he's better than what we have at the moment and wouldn't cost a lot - why not?
It's not as if the market for LB's is huge. Four players - Coentrao, Baines, Clichy, Enrique - seem realistically available if we would be willing to pay what their clubs want. Who else would be good enough for LFC and is actually available? I've seen people talk about Cissoko in various places, but there's no way Lyon will sell him for anything less than Coentrao will go for, especially considering Cissoko has never expressed a desire to leave.
Clichy, while not a world-beater, would improve our back line. For 5-8 million, go for it.