Where salt may be taken, if necessary? (2,1,5)
I believe the answer is:
at a pinch
'if necessary?' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for at a pinch that I've seen before include "In case of necessity" , "In time of difficulty or necessity - nip it" , "If absolutely necessary" , "if need be" , "under pressure" .)