Stretch things as far as possible, tailor's suggestion? (3,2,2)
I believe the answer is:
try it on
'stretch things as far' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'possible tailor's suggestion?' is the wordplay.
I cannot quite understand how this works, but
'possible' could be 'on' ('not on' can mean unacceptable or not possible) and 'on' is found within the answer.
The remaining letters 'tryit' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'as' is the link.
Can you help me to learn more?
(Other definitions for try it on that I've seen before include "Attempt to get away with something" , "See how much one can get away with" , "When buying new suit one should" , "trick" , "Test the boundaries" .)