### Clue: Secure gear climbing first in Dolomites (4)
### Answer: GIRD 
 ### Explanation: Definition: Secure
 **Reversal of**(… climbing, in a down clue) RIG(gear/equipment for a specific purpose) + **1st letter of**(first in) "Dolomites".
Defn: …/tie, as with a belt or sash round the waist.