Really faint flare fired from pistol (4,5)
I believe the answer is:
very light
'flare fired from pistol' is the definition.
I can't tell whether this defines the answer.
'really faint' is the wordplay.
'really' becomes 'very' (I've seen this in other clues).
'faint' becomes 'light'.
'very'+'light'='VERY LIGHT'
Can you help me to learn more?
(Other definitions for very light that I've seen before include "not at all difficult to carry" , "Pistol flare" , "Warning signal" , "Gun-fired flare" , "sort of flash" .)