Before all consonants other than plosives, AN /n/ tends to be elided after having nasalized the preceding vowel. As a result of this /n/-deletion, words like zonlicht, ongeluk may be [ˈzɔ̃lɪχt], [ˈɔ̃χəlʏk].
Although /n/-deletion also occurs in GA (see the section on nasal deletion), it does not apply in the same contexts as the Dutch rule. In words like sunlight, unrest, unwise, the nasal is not normally elided, even though the vowel is at least partly nasalized. So try to make a firm alveolar contact for /n/ in words like:
dancing mention inch lunches
only unrest onwards insensitive
moonlight unsure unlit sunshine