Bob will show you the quick way (5,3)
I believe the answer is:
short cut
'quick way' is the definition.
(I've seen this before)
'bob will show you the' is the wordplay.
I cannot really see how this works, but
'bob' could be 's' (abbreviation for shilling - 'bob' before 1971) and 's' is found within the answer.
'you' could be 'u' (I've seen this in other clues) and 'u' is found within the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for short cut that I've seen before include "Fast way of doing a thing" , "Route or tactic saving time or effort" , "Number one" , "Quick way" , "Time-saving manoeuvre" .)