26 across
Polluter
to
run
after
dirty
river
checked
by
Environment
Agency
(11)
Polluter to run after dirty river checked by Environment Agency (11)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
Polluter is the definition. Build it from ADULT (dirty) holding E (Environment) with R (river) to make ADULTER, then add A (Agency), then TO (to) and R (run) — the 'to run' coming after the rest — giving ADULTERATOR.