Crossword Genius

Garibaldi first used plasmas for lights (3,5)

Ross

I believe the answer is:

gas lamps

'lights' is the definition.
(gas lamp is a kind of light)

'garibaldi first used plasmas' is the wordplay.
'first' indicates taking the first letters.
'used' indicates an anagram.
The first letter of 'garibaldi' is 'g'.
'plasmas' is an anagram of 'aslamps'.
'g'+'aslamps'='GAS-LAMPS'

'for' is the link.

I've seen this clue in The Telegraph.
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