Getting down to the problem of food - fish (8)
I believe the answer is:
tackling
'getting down to the problem' is the definition.
I can't tell whether this definition defines the answer.
'food fish' is the wordplay.
'food' becomes 'tack' (informal term for food).
'fish' becomes 'ling' (ling is a kind of fish).
'tack'+'ling'='TACKLING'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for tackling that I've seen before include "Dealing with (a problem)" , "Taking on the challenge" , "Undertaking, dealing with" , "Taking the bull by the horns" .)