Give me strength and energy to shelter in oases in desert (3,7,4)

I believe the answer is:

for heavens sake

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'give me' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'strength and energy to shelter in oases in desert' is the wordplay.
'strength and energy' becomes 'e' (I am not sure about this - if you are sure you should believe this answer much more).
'to shelter in' is an insertion indicator.
'oases' becomes 'havens' ('haven' can be a synonym of 'oasis').
'in' indicates putting letters inside.
'desert' becomes 'forsake' (synonyms).
'e' going inside 'havens' is 'heavens'.
'heavens' inserted within 'forsake' is 'FOR HEAVENS SAKE'.

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I've seen this clue in The Independent.

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