What does the cryptic crossword clue "Medical units in action cleanable if mud's scattered (5,10)" mean?

The wordplay uses an anagram. anagram of CLEANABLE + IF + MUD'S = FIELDAMBULANCES The answer is FIELDAMBULANCES.

Medical units in action cleanable if mud's scattered (5,10)

Daily Mail Cryptic #17475 | 7 Down | 2024-10-25 flower