Crossword Genius

Rapid growth ruined a coastline (10)

Ross

I believe the answer is:

escalation

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

'ruined a coastline' is the wordplay.
'ruined' indicates anagramming the letters.
'a'+'coastline'='acoastline'
'acoastline' with letters rearranged gives 'ESCALATION'.

(Other definitions for escalation that I've seen before include "expansion" , "Rapid rise in level" , "Rapid growth" , "sudden rise" .)

I've seen this clue in The Times.
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