For example, Nelson’s secure refuge? (10)

I believe the answer is:

stronghold

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This clue could be a double definition.

'for example nelson's' is the first definition.
(type of wrestling hold)

'secure refuge?' is the second definition.
'stronghold' can be an answer for 'refuge?' (thesaurus). I'm not sure about the 'secure' bit.

Can you help me to learn more?

(Other definitions for stronghold that I've seen before include "Fortress" , "Keep" , "castle" , "Defence" .)

I've seen this clue in The Times.

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