It blows up general tortured by Resistance (8)

I believe the answer is:

enlarger

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'it blows up' is the definition.
The definition suggests a singular noun which matches the answer.

'general tortured by resistance' is the wordplay.
'tortured' indicates an anagram.
'by' says to put letters next to each other.
'resistance' becomes 'r' (electronics abbreviation).
'general' is an anagram of 'enlarge'.
'enlarge'+'r'='ENLARGER'

Can you help me to learn more?

(Other definitions for enlarger that I've seen before include "A stretcher" , "for use in the dark!" .)

I've seen this clue in The Sun.

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