Roving over dunes with Zulu? It’s a date! (10)
I believe the answer is:
rendezvous
'it's a date' is the definition.
(I've seen this before)
'roving over dunes with zulu?' is the wordplay.
'roving' is an anagram indicator.
'with' means one lot of letters goes inside another.
'zulu?' becomes 'Z' (phonetic alphabet: alpha, bravo, charlie etc.).
'over'+'dunes'='overdunes'
'overdunes' with letters rearranged gives 'rendevous'.
'rendevous' placed around 'z' is 'RENDEZVOUS'.
(Other definitions for rendezvous that I've seen before include "Meet - meeting" , "Arranged meeting" , "Meeting place" , "Date" , "Meeting-place" .)