There is a port which wants to provide convenient service in customs clearance, so I describe it as "a port friendly to customs clearance facilitation", which is a parody I make from the now ususal expression "environment-friendly something".
Is it a sensible expression or is there more concise expression for the same?
Yes, this kind of thing is common in English.
The district is friendly to young professionals looking to have a good time -- most establishments have no cover charge, and often have specials (special prices) on food and alcohol.
Singapore is especially friendly to expatriate businessmen since it has low income tax rates and no capital gains tax.
Actually, your phrase "friendly to customs clearance facilitation" sounds like a polite euphemism, meaning the officials at the port are open to taking bribes in return for "forgetting" regulations or "losing" paperwork that might slow down the import process, or require the importer to pay government tariffs.
As Andrew mentioned, "friendly" and "facilitate" aren't really the right words for a government agency that imposes taxes and tariffs; these could suggest that this port helps customers avoid certain taxes.
Some more suitable words could be: efficient, well-managed, convenient, or streamlined. For example:
a convenient port for efficient customs clearance
