The phrase "an extra complication" is correct and usable in written English.
You can use it when referring to an additional difficulty or issue that makes a situation more complex.
Example: "The unexpected weather changes added an extra complication to our travel plans."
Alternatives: "an additional hurdle" or "a further obstacle."
It's an extra complication and if they don't report it they get the NHS tariff.
"That's an extra complication," said Hiddink, who is coming to the end of his second stint in temporary charge.
When Jo Symons was found to have cancer, there was an extra complication: doctors could not tell what type of cancer she had.
The BBC however features an extra complication: it relies on the goodwill of governments to maintain a licence-fee settlement big enough to pay for its activities.
The introduction of Sun Microsystems, as a distribution partner for Netscape's software and a collaborator with AOL in developing cheap new Internet-access devices that use its Java programming language, is an extra complication.
There's an extra complication here, however.
These assumptions agree with the usual closed-loop performance specifications, so that closed-loop diagonal dominance is achieved without any extra complication on the controller design procedure.
Melvin was persuasive, MacPhee said, and he felt powerless to prevent the murder, so he wanted to at least prevent any extra complications.
And because the timetable's a bit obscure, too, there's the extra complication that MPs eyeing a deputy speakership, or deputy leadership, but who might fancy a select committee chair as a fallback, find themselves in a slightly awkward spot.
Not least, any further expansion to include Kosovo would carry the extra complication that the territory, like Bosnia, is a mainly Muslim state.
In total, $1.6bn has been requested to improve resilience and deal with the extra complication of Mali.
