Credit petrol company over bioenergy reserve fund — ultimately, it's inward-looking (5-4)
I believe the answer is:
cross-eyed
'inward-looking' is the definition.
(with eyes looking towards each other)
'credit petrol company over bioenergy reserve fund ultimately' is the wordplay.
'credit' becomes 'cr'.
'petrol company' becomes 'Esso' (Esso is a petrol company).
'over' is a reversal indicator.
'ultimately' suggests the final letters.
The last letters of 'bioenergy reserve fund' are 'yed'.
'esso' in reverse letter order is 'osse'.
'cr'+'osse'+'yed'='CROSS-EYED'
'it's' acts as a link.
(Other definitions for cross-eyed that I've seen before include "With a squint" , "Squinting" .)