Crossword Genius

Bust of a meth lab is understandable (10)

Ross

I believe the answer is:

fathomable

'understandable' is the definition.
(I've seen this before)

'bust of a meth lab' is the wordplay.
'bust' indicates anagramming the letters.
'of'+'a'+'meth'+'lab'='ofamethlab'
'ofamethlab' is an anagram of 'FATHOMABLE'.

'is' is the link.

(Other definitions for fathomable that I've seen before include "Comprehensible" , "understandable" .)

I've seen this clue in The Independent.
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