Period for Americans to bear crosses for fuel company (5)
I believe the answer is:
exxon
'fuel company' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'period for americans to bear crosses' is the wordplay.
I cannot quite see how this works, but
'crosses' could be 'xx' (two X's - X is a cross shape) and 'xx' is found in the answer.
'period' could be 'eon' (eon is a kind of period) and 'eon' is located in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
'for' is the link.
Can you help me to learn more?
(Another definition for exxon that I've seen is " US petrol company".)