Hold on to a German razorback snake (5)

I believe the answer is:

grasp

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'hold on to' is the definition.
(thesaurus)

'a german razorback snake' is the wordplay.
'a german razorback' becomes 'gr' (this might be a standard abbreviation which I don't know about).
'snake' becomes 'asp' (asp is a kind of snake).
'gr'+'asp'='GRASP'

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(Other definitions for grasp that I've seen before include "Catch on" , "Follow - understand - seize" , "Get hold of firmly" , "Support; rugby player" , "Clutch" .)

I've seen this clue in the Sydney Morning Herald.

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