Crossword Genius

Rely on foul saving time for wing (7)

Ross

I believe the answer is:

elytron

'wing' is the definition.
(wing case of a beetle)

'rely on foul saving time' is the wordplay.
'foul' indicates an anagram.
'saving' indicates putting letters inside.
'time' becomes 't' (abbreviation).
'rely'+'on'='relyon'
'relyon' with letters rearranged gives 'elyron'.
'elyron' enclosing 't' is 'ELYTRON'.

'for' is the link.

(Other definitions for elytron that I've seen before include "bit of a bug?" , "beetle wing" .)

I've seen this clue in The Times.
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