'Stay in touch, fellow tense and savage forest warden' (4,2,1,8)

I believe the answer is:

dont be a stranger

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'stay in touch' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'fellow tense and savage forest warden' is the wordplay.
'fellow' becomes 'don' (both can mean an academic).
'tense' becomes 't' (abbreviation used in many dictionaries).
'and' is a charade indicator (letters next to each other).
'savage' becomes 'beast' (synonyms).
'forest warden' becomes 'ranger' (I've seen this in another clue).
'don'+'t'+'beast'+'ranger'='DONT BE A STRANGER'

Can you help me to learn more?

I've seen this clue in The Everyman puzzle in The Observer.

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