Tidies up leaks containing tungsten (6)
I believe the answer is:
sweeps
'tidies up' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot see how one could define the other.
'leaks containing tungsten' is the wordplay.
'leaks' becomes 'seeps' (I've seen this in another clue).
'containing' is an insertion indicator.
'tungsten' becomes 'W' (W is the chemical symbol for tungsten).
'seeps' enclosing 'w' is 'SWEEPS'.
Can you help me to learn more?
(Other definitions for sweeps that I've seen before include "They clean chimneys with brushes" , "Clean with a broom" , "Moves in an arc" , "Old blackguards" , "Cleans the floor with a brush" .)