Strain to find way about the ship (6)
I believe the answer is:
stress
'strain' is the definition.
(I know that strain can be written as stress)
'way about the ship' is the wordplay.
I cannot really see how this works, but
'way' could be 'st' (abbreviation for street) and 'st' is located in the answer.
'about' could be 're' (regarding) and 're' is found within the answer.
'ship' could be 'ss' (prefix in ship names eg SS Great Britain) and 'ss' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'to find' acts as a link.
Can you help me to learn more?
(Other definitions for stress that I've seen before include "Particular emphasis" , "Tension, pressure" , "Strain or accentuate" , "why off work?" , "'Worry, pressure (6)'" .)