Clue: Going rhinal? It could be this with a girl, involving front of nose! (5)
Answer: HONGI
Explanation: Definition: Going rhinal? It could be this with a girl, involving front of nose!
GOING RHINAL is an anagram (indicated by *could be*) of HONGI A GIRL N (where N is [*front of*] N(ose)) and &lit. 
*Hongi is **a traditional Maori greeting in which people press their noses together