Depend on cash, having invested thousand on ring (4,2)

I believe the answer is:

look to

'depend on' is the definition.
(synonyms)

'cash having invested thousand on ring' is the wordplay.
'cash' becomes 'loot' (loot can mean stolen money).
'having invested' means one lot of letters goes inside another.
'thousand' becomes 'K' (synonyms).
'on ring' becomes 'o' (letter resembling a ring. I am not sure about the 'on' bit.).
'loot' enclosing 'k' is 'lookt'.
'lookt'+'o'='LOOK TO'

I've seen this clue in The Guardian.

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