Fuel in test that's explosive, ladies and gentlemen (7)
I believe the answer is:
toilets
'and gentlemen' is the definition.
I can't tell whether this defines the answer.
'fuel in test that's explosive' is the wordplay.
'fuel' becomes 'oil' (oil is a type of fuel).
'in' indicates putting letters inside.
'that's explosive' indicates an anagram.
'test' anagrammed gives 'tets'.
'oil' put inside 'tets' is 'TOILETS'.
'ladies' acts as a link.
Can you help me to learn more?
(Other definitions for toilets that I've seen before include "Lavatories" , "Plumbing fixtures" , "Perfume from iris root" , "Conveniences" , "Heads" .)