It's not hard to hold out (6)
I believe the answer is:
tender
'to hold out' is the definition.
(thesaurus)
'it's not hard' is the wordplay.
I cannot really see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is located in the answer.
The remaining letters 'ender' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for tender that I've seen before include "Make offer in gentle way" , "Delicate or kindhearted" , "Offer; sore" , "Offer, gentle, boat" , "Make formal offer" .)