British skate cooked for picnic hamper (6)
I believe the answer is:
basket
'picnic hamper' is the definition.
'basket' can be an answer for 'hamper' (I've seen this before). I am not certain of the 'picnic' bit.
'british skate cooked' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'cooked' indicates an anagram (letters cooked into a new form).
'skate' with letters rearranged gives 'asket'.
'b'+'asket'='BASKET'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for basket that I've seen before include "See 10" , "Container for shopping" , "Container made of interwoven cane or wire" , "Wicker carrier" , "Shopper may have this" .)