* "Manuka" is a Māori word. It doesn't have a direct equivalent in Tamil.
* "Honey" is "தேன்" (thēn) in Tamil. So, you could use "மனுக்கா தேன்" (manukkā thēn), but this sounds a bit awkward.
* Focus on the origin: You could say "நியூசிலாந்தில் இருந்து வந்த தேன்" (nūcīlānttil irunthu vantha thēn) - "honey from New Zealand".
Ultimately, the best way to convey the idea of "manuka honey" in Tamil might depend on the context. For example, if you're talking about its medicinal properties, you could say "மருத்துவ குணம் நிறைந்த தேன்" (maruththuva kuṇam niṟaintha thēn) - "honey with medicinal properties."