Crossword Genius

Prehistoric creature complete in hollow place (10)

Ross

I believe the answer is:

diplodocus

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

'complete in hollow place' is the wordplay.
'complete' becomes 'do' (doing is a kind of completing).
'in' means one lot of letters goes inside another.
'hollow' becomes 'dip' (I've seen this in other clues).
'place' becomes 'locus' (I've seen this before).
'dip'+'locus'='diplocus'
'do' going within 'diplocus' is 'DIPLODOCUS'.

(Another definition for diplodocus that I've seen is " prehistoric creature".)

I've seen this clue in The Times.
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