As a cricketer, requiring a stronger sunscreen (5,5)
I believe the answer is:
extra cover
'as' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I don't see?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for extra cover that I've seen before include "Greater insurance" , "Cricket fielder - more insurance?" , "Cricketer" .)